Heat assisted magnetic recording

Proceedings of the IEEE

Volumn 96, Issue 11, 2008, Pages 1810-1835

  Kryder, Mark H ^a,b   Gage, Edward C ^a   Mcdaniel, Terry W ^a   Challener, William A ^a   Rottmayer, Robert E ^a   Ju, Ganping ^a   Hsia, Yiao Tee ^a   Erden, M Fatih ^a  

^a SEAGATE TECHNOLOGY   (United States)

^b CARNEGIE MELLON UNIVERSITY   (United States)

Author keywords

Heat assisted magnetic recording; Hybrid recording; Near field; Thermal assist

Indexed keywords

HARD DISK STORAGE; LUBRICANTS; MAGNETIC RECORDING; MAGNETIC STORAGE; MAGNETISM; NEAR FIELD SCANNING OPTICAL MICROSCOPY; RECORDING INSTRUMENTS; THERMODYNAMIC STABILITY;

APPLIED MAGNETIC FIELDS; HEAT ASSISTED MAGNETIC RECORDING; HIGH MAGNETIC ANISOTROPY; HYBRID RECORDING; NEAR FIELDS; RECORDING CHANNELS; RECORDING MATERIALS; THERMAL ASSIST;

MAGNETIC ANISOTROPY;

EID: 57149140123     PISSN: 00189219     EISSN: None     Source Type: Journal    
DOI: 10.1109/JPROC.2008.2004315     Document Type: Article

References (138)

1. W. Challener, C. Mihalcea, C. Peng, and K. Pelhos, "Miniature planar solid immersion mirror with focused spot less than a quarter wavelength," Opt. Exp., vol. 13, pp. 7189-7197, 2005.
2. T. Matsumoto, Y. Anzai, T. Shintani, K. Nakamura, and T. Nishida, "Writing 40-nm marks using a beaked metallic plate near-field optical probe," in Proc. ISOM/ODS Conf., Honolulu, HI, 2005.
3. W. Challener, E. Gage, A. Itagi, C. Peng, and T. Rausch, "Optical transducers for near field recording," Jpn. J. Appl. Phys., vol. 45, pp. 6632-6642, 2006.
4. J.-U. Thiele, K. R. Coffey, M. F. Toney, J. A. Hedstrom, and A. J. Kellock, "Temperature dependent magnetic properties of highly chemically ordered Fe55-xNixPt45 L10 films," J. Appl. Phys., vol. 91, pp. 6595-6600, 2002.
5. H. N. Bertram, Theory of Magnetic Recording. Cambridge, U.K.: Cambridge Univ. Press, 1994.
6. M. Plumer, J. van Ek, and D. Weller, Eds., The Physics of Ultra-High Density Magnetic Recording. Berlin, Germany: Springer, 2001.
7. A. Lyberatos and K. Y. Guslienko, "Thermal stability of the magnetization following thermomagnetic writing in perpendicular media," J. Appl. Phys., vol. 94, pp. 1119-1129, 2003.
8. O. Chubykalo-Fesenko, U. Nowak, R. W. Chantrell, and D. Garanin, "Dynamic approach for micromagnetics close to the Curie temperature," Phys. Rev. B, vol. 74, p. 094436-1/5, 2006.
9. D. Weller and A. Moser, "Thermal effect limits in ultrahigh-density magnetic recording," IEEE Trans. Magn., vol. 35, pp. 4423-4439, 1999.
10. E. Gage et al., "An integrated recording head for heat assisted magnetic recording," presented at the ISOM Conf., Singapore, Oct. 2007, paper We-H-05.
11. T. W. McDaniel, "Ultimate limits to thermally assisted magnetic recording," J. Phys.: Cond. Matter, vol. 17, pp. R315-R332, 2005.
12. T. W. McDaniel and R. Victora, Eds., Handbook of Magneto-Optic Data Recording-Materials, Subsystems, Techniques. Salem, MA: Noyes, 1996.
13. S. M. Mansfield and G. S. Kino, "Solid immersion microscope," Appl. Phys. Lett., vol. 57, pp. 2615-2616, 2005.
14. Q. Wu, G. D. Feke, R. D. Grober, and L. P. Ghislain, "Realization of numerical aperture 2.0 using a gallium phosphide solid immersion lens," Appl. Phys. Lett., vol. 75, pp. 4064-4066, 1999.
15. M. Shinoda, K. Salto, T. Kondo, T. Ishimoto, and A. Nakaoki, "High density near field readout over 50 GB capacity using a solid immersion lens with high refractive index," in ISOM/ODS 2002 Tech. Dig., pp. 284-286.
16. F. Zijp, M. B. van der Mark, J. I. Lee, C. A. Verschuren, B. H. W. Hendriks, M. L. M. Balistreri, H. P. Urbach, M. A. H. van der Aa, and A. V. Padiy, "Near field read-out of a 50 GB first-surface disk with NA = 1.9 and a proposal for a cover-layer incident, dual-layer near field system," in Proc. SPIE, 2004, vol. 5380, pp. 209-223.
17. M. Shinoda, K. Saito, T. Ishimoto, T. Kondo, A. Nakaoki, M. Furuki, M. Takeda, Y. Akiyama, T. Shimouma, and M. Yamamoto, "High density near field optical disc recording using phase change media and polycarbonate substrate," in Proc. SPIE, 2004, vol. 5380, pp. 224-232.
18. K. Ueyanagi, Y. Uehara, Y. Adachi, T. Suzuki, S. Moriyasu, T. Suzuki, K. Wakabayashi, Y. Yamagata, and H. Ohmori, "Fabrication of a hemi-paraboloidal solid immersion mirror and designing of an optical head with the mirror," Jpn. J. Appl. Phys., vol. 42, pp. 898-903, 2003.
19. T. Rausch, J. A. Bain, D. D. Stancil, and T. E. Schlesinger, "Near field hybrid recording with a mode index waveguide lens, " in Proc. SPIE, 2000, vol. 4090, pp. 66-71.
20. L. Zhou, T. E. Schlesinger, and J. A. Bain, "Mode index lens for light concentration in heat assisted magnetic recording," in MORIS 2007 Tech. Dig., Pittsburgh, PA, 2007, pp. 61-62.
21. W. A. Challener, C. Mihalcea, C. Peng, and K. Pelhos, "Miniature planar solid immersion mirror with focused spot less than a quarter wavelength," Opt. Exp., vol. 13, pp. 7189-7197, 2005.
22. H. Bethe, "Theory of diffraction by small holes," Phys. Rev., vol. 66, pp. 163-182, 1944.
23. M. Ohtsu and H. Hori, Near-Field Nano-Optics. New York: Kluwer, 1999, p. 129.
24. E. Betzig, J. K. Trautman, T. D. Harris, J. S. Weiner, and R. L. Kostelak, "Breaking the diffraction barrier: Optical microscopy on a nanometric scale," Science, vol. 251, pp. 1468-1470, 1991.
25. E. Betzig, J. K. Trautman, R. Wolfe, E. M. Gyorgy, P. L. Finn, M. H. Kryder, and C.-H. Chang, "Near-field magneto-optics and high density data storage," Appl. Phys. Lett., vol. 61, pp. 142-144, 1992.
26. A. Partovi, D. Peale, M. Wuttig, C. A. Murray, G. Zydzik, L. Hopkins, K. Baldwin, W. S. Hobson, J. Wynn, J. Lopata, L. Dhar, R. Chichester, and J. H.-J. Yeh, "High-power laser light source for near-field optics and its application to high-density optical data storage," Appl. Phys. Lett., vol. 75, pp. 1515-1517, 1999.
27. F. Chen, A. Itagi et al., "Imaging of optical field confinement in ridge waveguides fabricated on very-small-aperture laser," Appl. Phys. Lett., vol. 83, pp. 3245-3247, 2003.
28. R. Wannemacher, "Plasmon supported transmission of light through nanometric holes in metallic thin films," Opt. Commun., vol. 195, pp. 107-118, 2001.
29. W. A. Challener, T. W. McDaniel, C. D. Mihalcea, K. R. Mountfield, K. Pelhos, and I. K. Sendur, "Light delivery techniques for heat-assisted magnetic recording," Jpn. J. Appl. Phys., vol. 42, pp. 981-988, 2003.
30. W. A. Challener, E. Gage, A. Itagi, and C. Peng, "Optical transducers for near field recording," Jpn. J. Appl. Phys., vol. 45, pp. 6632-6642, 2006.
31. T. W. Ebbesen, H. J. Lezec, H. F. Ghaemi, T. Thio, and P. A. Wolff, "Extraordinary optical transmission through sub-wavelength hole arrays," Nature, vol. 391, pp. 667-669, 1998.
32. C. Genet and T. W. Ebbesen, "Light in tiny holes," Nature, vol. 445, pp. 39-46, 2007.
33. T. Thio, H. J. Lezec, and T. W. Ebbesen, "Strongly enhanced optical transmission through subwavelength holes in metal films," Phys. B, vol. 279, pp. 90-93, 2000.
34. T. Thio, K. M. Pellerin, R. A. Linke, H. J. Lezec, and T. W. Ebbesen, "Enhanced light transmission through a single subwavelength aperture," Opt. Lett., vol. 26, pp. 1972-1974, 2001.
35. R. F. Service, "Lighting the way ahead for data storage," Science, vol. 294, pp. 1448-1449, 2001.
36. O. T. A. Janssen, H. P. Urbach, and G. W. 't Hooft, "Giant optical transmission of a subwavelength slit optimized using the magnetic field phase," Phys. Rev. Lett., vol. 99, pp. 043902/1-043902/4, 2007.
37. J. Olkkonen, K. Kataja, J. Aikio, and D. Howe, "On surface plasmon enhanced near-field transducers," in Proc. SPIE, 2004, vol. 5380, pp. 360-367.
38. X. Shi, R. L. Thornton, and L. Hesselink, "A nano-aperture with 1000x power throughput enhancement for very small aperture laser system (VSAL)," in Proc. SPIE, 2002, vol. 4342, p. 320.
39. T. E. Schlesinger, T. Rausch, A. Itagi, J. Zhu, J. A. Bain, and D. D. Stancil, "An integrated read/write head for hybrid recording," Jpn. J. Appl. Phys., vol. 41, pp. 1821-1824, 2002.
40. K. Sendur, C. Peng, and W. Challener, "Near-field radiation from a ridge waveguide transducer in the vicinity of a solid immersion lens," Phys. Rev. Lett., vol. 94, pp. 043901/1-043901/4, 2005.
41. W. A. Challener, E. Gage, A. Itagi, and C. Peng, "Optical transducers for near field recording," Jpn. J. Appl. Phys., vol. 45, pp. 6632-6642, 2006.
42. L. Wang, S. M. Uppuluri, E. X. Jin, and X. Xu, "Nanolithography using high transmission nanoscale bowtie apertures," Nano Lett., vol. 6, pp. 361-364, 2006.
43. K. Tanaka, M. Oumi, T. Niwa, S. Ichihara, Y. Mitsuoka, K. Nakajima, T. Okhubo, H. Hosaka, and K. Itao, "Numerical simulation of the near-field optical head with a triangular aperture," in ISOM/ODS 2002 Tech. Dig., pp. 320-322.
44. M. Hirata, M. Park, M. Oumi, K. Nakajima, and T. Ohkubo, "Near-field optical flying head with a triangle aperture," in MORIS 2007 Tech. Dig., Pittsburgh, PA, pp. 35-36.
45. J. Xu, T. Xu, J. Wang, and Q. Tian, "Design tips of nanoapertures with strong field enhancement and proposal of novel L-shaped aperture," Opt. Eng., vol. 44, p. 018 001, 2005.
46. R. D. Grober, R. J. Schoelkopf, and D. E. Prober, "Optical antenna: Towards a unity efficiency near-field optical probe," Appl. Phys. Lett., vol. 70, pp. 1354-1356, 1997.
47. K. Şendur and W. Challener, "Near-field radiation of bow-tie antennas and apertures at optical frequencies," J. Microsc., vol. 210, pp. 279-283, 2003.
48. A. Sundaramurthy, K. B. Crazier, G. S. Kino, D. P. Fromm, P. J. Schuck, and W. E. Moerner, "Field enhancement and gap-dependent resonance in a system of two opposing tip-to-tip Au nanotriangles," Phys. Rev. B, vol. 72, p. 165 409, 2005.
49. A. Sundaramurthy, P. J. Schuck, N. R. Conley, D. P. Fromm, G. S. Kino, and W. E. Moerner, "Toward nanometer-scale optical photolithography: Utilizing the near-field of bowtie optical nanoantennas, " Nano Lett., vol. 6, pp. 355-360, 2006.
50. E. X. Jin and X. Xu, "Enhanced optical near field from a bowtie aperture," Appl. Phys. Lett., vol. 88, p. 153 110, 2006.
51. W. A. Challener, E. Gage, A. Itagi, and C. Peng, "Optical transducers for near field recording," Jpn. J. Appl. Phys., vol. 45, pp. 6632-6642, 2006.
52. J. N. Farahani, H.-J. Eisler, D. W. Pohl, M. Pavius, P. Flückiger, P. Gasser, and B. Hecht, "Bow-tie optical antenna probes for single-emitter scanning near-field optical microscopy," Nanotechnology, vol. 18, p. 125 506, 2007.
53. R. M. Bakkerl, A. Boltasseva, Z. Liu, R. H. Pedersen, S. Gresillon, A. V. Kildishev, V. P. Drachev, and V. M. Shalaev, "Near-field excitation of nanoantenna resonance," Opt. Expr., vol. 15, pp. 13 682-13 688, 2007.
54. E. Cubukcu, E. A. Kort, K. B. Crazier, and F. Capasso, "Plasmonic laser antenna," Appl. Phys. Lett., vol. 89, p. 093 120, 2006.
55. N. Yu, E. Cubukcu, L. Diehl, M. A. Belkin, K. B. Crozier, F. Capasso, D. Bour, S. Corzine, and G. Höflere, "Plasmonic quantum cascade laser antenna," Appl. Phys. Lett., vol. 91, pp. 173113/1-173113/3, 2007.
56. T. Matsumoto, Y. Anzai, T. Shintani, K. Nakamura, and T. Nishida, "Writing 40-nm marks using a beaked metallic plate near-field optical probe," presented at the ISOM/ODS Conf., Honolulu, HI, 2005.
57. T. Matsumoto, T. Shimano, H. Saga, H. Sukeda, and M. Kiguchi, "Highly efficient probe with a wedge-shaped metallic plate for high density near-field optical recording," J. Appl. Phys., vol. 95, pp. 3901-3906, 2004.
58. T. Matsumoto, Y. Anzai, T. Shintani, K. Nakamura, and T. Nishida, "Writing 40 nm marks by using a beaked metallic plate near-field optical probe," Opt. Lett., vol. 31, pp. 259-261, 2006.
59. T. Matsumoto, K. Nakamura, T. Nishida, H. Hieda, A. Kikitsu, K. Naito, and T. Koda, "Thermally assisted magnetic recording on bit-patterned magnetic medium using near-field optical head with beaked metallic plate," in MORIS 2007 Tech. Dig., Pittsburgh, pp. 41-42.
60. S. Hasegawa and F. Tawa, "Generation of nanosized optical beams by use of butted gratings with small numbers of periods," Appl. Opt., vol. 43, pp. 3085-3096, 2004.
61. F. Tawa, S. Hasegawa, and W. Odajima, "Optical head with a butted-grating structure that generates a subwavelength spot for laser-assisted magnetic recording," J. Appl. Phys., vol. 101, pp. 09H503/1-09H503/3, 2007.
62. F. Tawa, S. Hasegawa, and W. Odajima, "Multilayer optical head using the butted grating structure for hybrid recording, " in MORIS 2007 Tech. Dig., Pittsburgh, PA, pp. 3-4.
63. A. Partovi, D. Peale, M. Wuttig, C. A. Murray, G. Zydzik, L. Hopkins, K. Baldwin, W. S. Hobson, J. Wynn, J. Lopata, L. Dhar, R. Chichester, and J. H.-J. Yeh, "High-power laser light source for near-field optics and its application to high-density optical data storage, " Appl. Phys. Lett., vol. 75, pp. 1515-1517, 1999.
64. F. Chen, A. Itagi, J. A. Bain, D. D. Stancil, T. E. Schlesinger, L. Stebounova, G. C. Walker, and B. B. Akhremitchev, "Imaging of optical field confinement in ridge waveguides fabricated on very-small-aperture laser," Appl. Phys. Lett., vol. 83, pp. 3245-3247, 2003.
65. T. Ohno, A. V. Itagi, F. Chen, J. A. Bain, and T. E. Schlesinger, "Characterization of very small aperture GaN lasers," in Proc. SPIE, 2004, vol. 5380, pp. 393-402.
66. E. Cubukcu, E. A. Kort, K. B. Crozier, and F. Capasso, "Plasmonic laser antenna," Appl. Phys. Lett., vol. 89, p. 093 120, 2006.
67. T. Ishimoto, K. Saito, T. Kondo, A. Nakaoki, and M. Yamamoto, "Gap servo system for a biaxial device using an optical gap signal in a near field readout system," in ISOM/ODS 2002 Tech. Dig., pp. 287-289.
68. K. Ueyanagi, Y. Adachi, T. Suzuki, K. Wakabayashi, Y. Uehara, T. Suzuki, S. Moriyasu, Y. Yamagata, and H. Ohmori, "Fabrication and optical characteristics of a hemi-paraboloidal solid immersion mirror and designing of an optical head with the mirror," in ISOM/ODS 2002 Tech. Dig., pp. 401-403.
69. N. J. Gokemeijer, W. A. Challener, E. Gage, Y.-T. Hsia, G. Ju, D. Karns, D. Karns, L. Li, B. Lu, K. Pelhos, C. Peng, R. E. Rottmayer, X. Yang, H. Zhou, T. Rausch, and M. Seigler, "Challenges in heat assisted magnetic recording," in MORIS 2007 Tech. Dig., Pittsburgh, PA, pp. 1-2.
70. C. Peng and W. Challener, "Input-grating couplers for narrow Gaussian beam: Influence of groove depth," Opt Exp., vol. 12, pp. 6481-6490, 2004.
71. K. Strnat, G. Hoffer, J. Olsen, W. Ostertag, and J. Becker, "A family of new cobalt-based permanent magnetic materials," J. Appl. Phys., vol. 38, pp. 1001-1002, 1967.
72. O. A. Ivanov, L. V. Solina, V. A. Demshina, and L. M. Magat, "Determination of the anisotropy constant and saturation magnetization, and magnetic properties of powers of an iron-platinum alloy," Phys. Met. Metallog., vol. 35, p. 81, 1973.
73. 14B," Phys. Rev., vol. B 29, pp. 4176-4178, 1984.
74. A. Lyberatos and J. Hohlfeld, "Model of thermal erasure in neighboring tracks during thermomagnetic writing," J. Appl. Phys., vol. 95, pp. 1949-1957, 2004.
75. B. Knigge, O. Ruiz, and P. Baumgart, in Proc. Asia-Pacific Recording Conf. 2006, 2006, vol. 1-2.
76. G. Knight. (1998, Jul.). "Near-field recording: TeraSor's mass storage benchmark technology for the next decade," in Proc. THIC Meeting, San Mateo, CA. [Online]. Available: http://www.thic.org/pdf/Jul98/ terastor.gknight.pdf
77. J. F. Heanue, "Micro-optical requirements for optically-assisted Winchester recording heads," in Proc. SPIE, 1999, vol. 3778, pp. 98-103.
78. T. Miyauchi, Y. Yutake, and T. Sekiya "Magneto-optical playback heads," European Patent EPO 338 864 A2, Oct. 25, 1989.
79. J.-M. Fedelli, H. Jouve, S. Renard, and S. Valette, "Integrated magneto-optical having a magnetic head set back from an optical head," U.S. Patent 5 440 530, Aug. 8, 1995.
80. R. Rottmayer, C. Cheng, X. Shi, L. Tong, and H. Tong, "Read/write head and method for magnetic reading and magneto-optical writing on a data storage medium," U.S. Patent 5 986 978, Nov. 16, 1999.
81. W. A. Challener, "Heat assisted magnetic recording with a planar waveguide," U.S. Patent 6 944 112 B2, Sep. 13, 2005.
82. E. C. Gage, G. R. Grey, L. C. Swanson, and R. E. Gerber, "Laser assisted magnetic recording apparatus and method," U.S. Patent 6 762 977 B1, Jul. 13, 2004.
83. T. Matsumoto, Y. Anzai, T. Shintani, K. Nakamura, and T. Nishida, "Writing 40 nm marks by using a beaked metallicplate near-field optical probe," Opt. Lett., vol. 31, pp. 259-261, 2006.
84. Optoelectronic Industry and Technology Development Association, Key technologies for the optical memory industry in the 21st century from terabyte optical memory project, Jul. 2007.
85. T. Rausch et al., "Near field heat assisted magnetic recording with a planar solid immersion lens," Jpn. J. Appl. Phys., vol. 45, pp. 1314-1320, 2006.
86. R. E. Rottmayer, S. Batra, D. Buechel, W. A. Challener, J. Hohlfeld, Y. Kubota, L. Li, B. Lu, C. Mihalcea, K. Mountfield, K. Pelhos, C. Peng, T. Rausch, M. A. Seigler, D. Weller, and X. Yang, "Heat-assisted magnetic recording," IEEE Trans. Magn., vol. 42, 2006.
87. M. A. Seigler, W. A. Challener, E. Gage, N. Gokemeijer, B. Lu, K. Pelhos, C. Peng, R. E. Rottmayer, X. Yang, H. Zhou, X. Zhu, and T. Rausch, "Heat assisted magnetic recording with a fully integrated recording head," in Proc. Opt. Data Storage Conf., 2007.
88. T. Rausch, C. D. Mihalcea, K. Pelhos, C. Peng, E. C. Gage, K. Mountfield, M. A. Seigler, and W. A. Challener, "Spin stand characterization of dielectric optical waveguides fabricated on AlTiC sliders for heat assisted magnetic recording," in Proc. SPIE, vol. 5380, Optical Data Storage Conference, 2004, pp. 40-46.
89. D. Weller and A. Moser, "Thermal effect limits in ultrahigh-density magnetic recording," IEEE Trans. Magn., vol. 35, pp. 4423-4439, 1999.
90. 2," IEEE Trans. Magn., vol. 36, pp. 10-15, 2000.
91. 0 ordered FePd ferromagnets, " Scripta Metallurgica et Materialia, vol. 33, pp. 1793-1805, 1995.
92. 5 with very high perpendicular magnetic anisotropy," Appl. Phys. Lett., vol. 85, p. 5640, 2004.
93. 5 thin films deposited on Cu and Pt underlayers," J. Appl. Phys., vol. 100, p. 053 913, 2006.
94. 5 thin film with perpendicular magnetic anisotropy," J. Magn. Magn. Mater., vol. 287, p. 239, 2005.
95. G. A. Bettero and R. Sinclair, "(Pt/Co/Pt)/X multilayer films with high Kerr rotations and large perpendicular magnetic anisotropics,'' Appl. Phys. Lett., vol. 64, pp. 3337-3339, 1994.
96. J. M. MacLaren and R. H. Victora, "Theoretical predictions of interface anisotropy in the presence of interdiffusion," J. Appl. Phys., vol. 76, pp. 6069-6074, 1994.
97. 2-Pt granular multilayer perpendicular recording media," IEEE Trans. Magn., vol. 40, pp. 2489-2491, 2004.
98. Y. Kawada, Y. Ueno, and K. Shibata, "Co-Pt multilayers perpendicular magnetic recording media with thin Pt layer and high perpendicular anisotropy," IEEE Trans. Magn., vol. 38, pp. 2045-2047, 2002.
99. 2: Hybrid recording?" J. Appl. Phys., vol. 87, p. 5398, 2000.
100. H. Nemoto, H. Saga, H. Sukeda, and M. Takahashi, "Exchange-coupled magnetic bilayer media for thermomagnetic writing and flux detection," Jpn. J. Appl. Phys., vol. 38, pp. 1841-1842, 1999.
101. H. Katayama, S. Sawamura, Y. Ogimoto, J. Nakajima, K. Kojima, and K. Ohta, "New magnetic recording method using laser assisted read/write technologies," J. Magn. Soc. Jpn., vol. 23, no. Suppl. S1, p. 233, 1999.
102. A. Lyberatos and K. Y. Guslienko, "Thermal stability of the magnetization following thermomagnetic writing in perpendicular media," J. Appl. Phys., vol. 94, pp. 1119-1129, 2003.
103. J. J. M. Ruigrok, "Limits of conventional and thermally-assisted recording," J. Magn. Soc. Jpn., vol. 25, no. 3-2, p. 313, 2001.
104. 0 films," J. Appl. Phys., vol. 91, pp. 6595-6600, 2002.
105. 0 FePt films with perpendicular anisotropy deposited on glass substrate at reduced temperature," Appl. Phys. Lett., vol. 90, p. 042 508, 2007.
106. 0 FePt-C (001) films with high coercivity and small grain size," Appl. Phys. Lett., vol. 91, p. 132 506, 2007.
107. T. Maeda, T. Kai, A. Kikitsu, T. Nagase, and J. Akiyama, "Reduction of ordering temperature of an FePt-ordered alloy by addition of Cu," Appl. Phys. Lett., vol. 80, p. 2147, 2002.
108. 0 ordering and microstructure of FePt thin films with Cu, Ag, and Au additive," J. Appl. Phys., vol. 92, p. 6104, 2002.
109. D. Ravelosona, C. Chappert, V. Mathet, and H. Bermas, "Chemical order induced by ion irradiation in FePt (001) films," Appl. Phys. Lett., vol. 76, p. 236, 2000.
110. T. Shima, T. Moriguchi, S. Mitani, and K. Takanashi, "Chemical order induced by ion irradiation in FePt (001) films," Appl. Phys. Lett., vol. 80, p. 288, 2002.
111. T. Suzuki, K. Harada, N. Honda, and K. Ouchi, "Preparation of ordered Fe-Pt thin films for perpendicular magnetic recording media," J. Magn. Magn. Mater., vol. 193, pp. 85-88, 1999.
112. Y.-N. Hsu, S. Jeong, D. N. Lambeth, and D. Laughlin, "Effects of Ag underlayers on the microstructure and magnetic properties of epitaxial FePt thin films," J. Appl. Phys., vol. 89, p. 7068, 2001.
113. x underlayer at low substrate temperature," Appl. Phys. Lett., vol. 80, p. 3325, 2002.
114. 0 ordered FePt:C composite films with (001) texture," IEEE Trans. Magn., vol. 40, pp. 2470-2472, 2004.
115. K. Kang, Z. G. Zhang, C. Papusoi, and T. Suzuki, "Composite nanogranular films of FePt-MgO with (001) orientation onto glass substrates," Appl. Phys. Lett., vol. 84, p. 404, 2004.
116. V. Guo, B. Lu, X. W. Wu, G. Ju, and D. Weller, "A survey of anisotropy measurement techniques and study of thickness effect on interfacial and volume anisotropics in Co/Pt multilayer media," J. Appl. Phys., vol. 99, p. 08E 918, 2006.
117. D. Karns et al., "Design and characterization of a media thermal stack for confining lateral thermal heat flow," in Proc. Intermag 2008.
118. J.-U. Thiele, S. Maat, and E. E. Fullerton, "A survey of anisotropy measurement techniques and study of thickness effect on interfacial and volume anisotropics in Co/Pt multilayer media," Appl. Phys. Lett., vol. 82, p. 2859, 2003.
119. J.-U. Thiele, S. Maat, E. E. Fullerton, and J. L. Robertson, "Magnetic and structural properties of FePt-FeRh exchange spring films for thermally assisted magnetic recording media," IEEE Trans. Magn., vol. 40, p. 2537, 2004.
120. K. R. Coffey, J.-U. Thiele, and D. Weller, "'Thermal spring' magnetic recording media for writing using magnetic and thermal gradients," U.S. Patent 6 881 497 B2, 2005.
121. A. Kikitsu, T. Kai, T. Nagase, and J.-I. Akiyama, "A concept of exchange-coupled recording medium for heat-assisted magnetic recording," J. Appl. Phys., vol. 97, p. 10P701, 2005.
122. T. Rausch, C. D. Mihalcea, K. Pelhos, C. Peng, E. C. Gage, K. Mountfield, M. A. Seigler, and W. A. Challener, "Spin stand characterization of dielectric optical waveguides fabricated on AlTiC sliders for heat-assisted magnetic recording," in Proc. SPIE, 2004, vol. 5380, pp. 40-46.
123. W. Peng, Y.-T. Hsia, S. Kursat, and T. McDaniel, "Thermo-magneto- mechanical analysis of head-disk interface in heat assisted magnetic recording," Tribology Int., vol. 38, pp. 588-593, 2005.
124. L. Li, P. M. Jones, and Y. T. Hsia, "Effect of chemical structure and molecular weight on high-temperature stability of some Fomblin Z-type lubricants," Tribology Lett., vol. 16, p. 21, 2004.
125. J.-U. Thiele, S. Maat, and E. E. Fullerton, "FeRh/FePt exchange spring films for thermally assisted magnetic recording media," Appl. Phys. Lett., vol. 82, pp. 2859-2861, 2003.
126. H. Chiba, Y. Oshikubo, K. Watanabe, T. Tokairin, and E. Yamakawa, "Synthesis of tri-functional PFPE lubricants and its spreading characteristics on a hard disk surface," in Proc. 2004 Int. Symp. Micro-Nanomechatron. Human Sci., Nov. 2004, vol. 31, pp. 261-264.
127. J. Zhang, R. Ji, J. W. Xu, J. K. P. Ng, B. X. Xu, H. X. Yuan, and S. N. Piramanayagam, "Lubrication for heat-assisted magnetic recording media," IEEE Trans. Magn., vol. 42, pp. 2546-2548, Oct. 2006.
128. L. Li, C. L. Platt, and Y. T. Hsia, "Head Disc Interface Design," U.S. Patent Appl. Office Pub. 2006/0105203 Al, May 18, 2006.
129. M. S. Lim and A. Gellman, "Kinetics of laser induced desorption and decomposition of Fomblin Zdol on carbon overcoats," Tribology int., vol. 38, pp. 554-561, 2005.
130. L. Wu, "Modelling and simulation of the lubricant depletion process induced by laser heating in heat-assisted magnetic recording system," Nanotechnology, vol. 18, p. 215702, 2007.
131. T. Rausch, J. A. Bain, D. D. Stancil, and T. E. Schlesinger, "Thermal Williams-Comstock model for predicting transition length in a heat-assisted magnetic recording system," IEEE Trans. Magn., vol. 40, pp. 137-147, 2004.
132. M. F. Erden, T. Rausch, and W. Challener, "Cross-track location and transition parameter effects in heat-assisted magnetic recording," IEEE Trans. Magn., vol. 41, pp. 2189-2194, 2005.
133. R. Radhakrishnan, M. F. Erden, C. He, and B. Vasic, "Transition response characteristics of heat-assisted magnetic recording and their performance with MTR codes," IEEE Trans. Magn., vol. 43, pp. 2298-2300, 2007.
134. J. Moon and W. Zeng, "Equalization for maximum likelihood detectors," IEEE Trans. Magn., vol. 31, pp. 1083-1088, 1995.
135. B. Brickner and J. Moon, "Design of a rate 6/7 maximum transition run code," IEEE Trans. Magn., vol. 33, pp. 2749-2751, 1997.
136. W. Bliss, "An 8/9 time-varying trellis code for high density magnetic recording," IEEE Trans. Magn., vol. 33, pp. 2746-2748, 1997.
137. M. F. Erden, P. D. Mathur, W. A. Challener, E. C. Gage, W. Peng, and T. W. McDaniel, "Compensating the effects of static head-media spacing variations and nonlinear transition shift in heat assisted magnetic recording," U.S. Patent Applicat. 20 070 230 012.
138. M. Mansuripur, The Physical Principles of Magneto-Optical Recording. Cambridge, U.K.: Cambridge Univ. Press, 1995.