Effect of intergranular exchange on the thermal stability and coercive field of perpendicular, single phase, exchange spring, and coupled granular continuous (CGC) perpendicular recording media

IEEE Transactions on Magnetics

Volumn 45, Issue 1, 2009, Pages 88-99

  Suess, D ^a   Lee, J ^a   Fidler, J ^b   Jung, H S ^b   Velu, E M T ^b   Jiang, W ^b   Malhotra, S S ^b   Bertero, G ^b   Schrefl, T ^c  

^a VIENNA UNIVERSITY OF TECHNOLOGY   (Austria)

^b WESTERN DIGITAL CORPORATION   (United States)

^c UNIVERSITY OF SHEFFIELD   (United Kingdom)

Author keywords

CGC; Continuous coupled granular; Dual layer; Exchange spring media; Intergrain exchange; Thermal stability

Indexed keywords

COERCIVE FORCE; EXCHANGE COUPLING; GRAIN SIZE AND SHAPE; MAGNETIC LOGIC DEVICES; MAGNETIC RECORDING; MAGNETISM; SPRINGS (COMPONENTS); STABILITY; TEXTURES;

CONTINUOUS COUPLED GRANULAR; DUAL LAYER; EXCHANGE SPRING MEDIA; INTER-GRANULAR EXCHANGE COUPLINGS; INTERGRAIN EXCHANGE; INTERGRAIN EXCHANGE COUPLING; PERPENDICULAR RECORDING MEDIA; SWITCHING FIELD DISTRIBUTION;

THERMODYNAMIC STABILITY;

EID: 59849124340     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMAG.2008.2002859     Document Type: Article

References (29)

1. S. H. Charap, P. L. Lu, and Y. J. He, "Thermal stability of recorded information at high densities," IEEE Trans. Magn., vol. 33, no. 1, pp. 978-983, Jan. 1997.
2. S. Mao, "Reader technology for 1 tbpsi recording," in Proc. PMRC Conf., Tokyo, Japan, Oct. 15, 2007.
3. E. E. Fullerton, D. T. Margulies, M. E. Schabes, M. Carey, B. Gurney, A. Moser, M. Best, G. Zeltzer, K. Rubin, H. Rosen, and M. Doerner, "Antiferromagnetically coupled magnetic media layers for thermally stable high-density recording," Appl. Phys. Lett., vol. 77, pp. 3806-3808, 2000.
4. E. N. Abarra, A. Inomata, H. Sato, I. Okamoto, and Y. Mizoshita, "Longitudinal magnetic recording media with thermal stabilization layers," Appl. Phys. Lett., vol. 77, pp. 2581-2583, 2000.
5. E. Girt and H. J. Richter, "Antiferromagnetically coupled perpendicular recording media," IEEE Trans. Magn., vol. 39, no. 5, pp. 2306-2310, Sep. 2003.
6. A. Hoagland, "History of magnetic disk storage based on perpendicular magnetic recording," IEEE Trans. Magn., vol. 39, no. 4, pp. 1871-1875, Jul. 2003.
7. S. Iwasaki, Y. Nakamura, and K. Ouchi. "Perpendicular magnetic recording with a composite anisotropy film," IEEE Trans. Magn., vol. MAG-15, no. 6, pp. 1456-1458, Nov. 1979.
8. H. J. Richter, "Longitudinal recording at 10 to 20 Gbit/inch (2) and beyond," IEEE Trans. Magn., vol. 35, no. 5, pp. 2790-2795, Sep. 1999.
9. Y. Sonobe, D. Weller, Y. Ikeda, K. Takano, M. E. Schabes, G. Zeltzer, H. Do, B. K. Yen, and M. E. Best, "Coupled granular/continuous medium for thermally stable perpendicular magnetic recording," J. Magn. Magn. Mater., vol. 235, pp. 424-428, 2001.
10. Y. Sonobe, D. Weller, Y. Ikeda, M. Schabes, K. Takano, G. Zeltzer, B. K. Yen, M. E. Best, S. J. Greaves, H. Muraoka, and Y. Nakamura, "Thermal stability and SNR of coupled granular/continuous media," IEEE Trans. Magn., vol. 37, no. 4, pp. 1667-1670, Jul. 2001.
11. F. Garcia-Sanchez, O. Chubykalo-Fesenko, O. Mryasov, R. W. Chantrell, and K. Y. Guslienko, Appl. Phys. Lett., vol. 87, p. 122501, 2005.
12. J. C. Slonczewski, "Overview of interlayer exchange theory," J. Magn. Magn. Mater., vol. 150, pp. 13-14, 1995.
13. U. Kwon, R. Sinclair, E. M. T. Velu, S. Malhotra, and G. Bertero, "Ru/Ru-oxide interlayers for CoCrPtO perpendicular recording media," IEEE Trans. Magn., vol. 41, no. 10, pp. 3193-3195, Oct. 2005.
14. D. Suess, T. Schrefl, S. Fahler, M. Kirschner, G. Hrkac, F. Dorfbauer, and J. Fidler, "Exchange spring media for perpendicular recording," Appl. Phys. Lett., vol. 87, p. 012504, 2005.
15. R. H. Victora and X. Shen, "Exchange coupled composite media for perpendicular magnetic recording," IEEE Trans. Magn., vol. 41, no. 10, pp. 2828-2833, Oct. 2005.
16. H. J. Richter, "The transition from longitudinal to perpendicular recording," J. Phys. D: Appl. Phy., vol. 40, pp. R149-R177, 2007.
17. D. Suess, submitted for publication.
18. A. M. Goodman, S. J. Greaves, Y. Sonobe, H. Muraoka, and Y. Nakamura, "Smoothing of bit transition irregularity in coupled granular/continuous perpendicular media," J. Appl. Phys., vol. 91, p. 10, 2002.
19. H. S. Jung, E. M. T. Velu, S. S. Malhotra,' U. Kwon, D. Suess, and G. Bertero, "CoCrPtO-based granular composite perpendicular recording media," IEEE Trans. Magn., vol. 43, no. 6, pp. 2088-2090, Jun. 2007.
20. R. Dittrich, T. Schrefl, D. Suess, W. Scholz, H. Forster, and J. Fidler, "A path method for finding energy barriers and minimum energy paths in complex micromagnetic systems." J. Magn. Magn. Mater., vol. 250. pp. 12-19, 2002.
21. J. P. Wang, W. K. Shen, and J. M. Bai, "Exchange coupled composite media for perpendicular magnetic recording," IEEE Trans. Magn., vol. 41, no. 10, pp. 3181-3186, Oct. 2005.
22. F. Garcia-Sanchez, O. Chubykalo-Fesenko, O. Mryasov, R. W. Chantrell, and K. Y. Guslienko, "Exchange spring structures and coercivity reduction in FePt/FeRh bilayers: A comparison of multiscale and micromagnetic calculations," Appl. Phys. Lett., vol. 87, p. 122501, 2005.
23. A. Dobin and H. J. Richter, "Domain wall assisted magnetic recording," Appl. Phys. Lett., vol. 89, p. 062512, 2006.
24. M. Kapoor, X. Shen, and R. H. Victora, "Effect of intragranular exchange on exchange-coupled composite media," J. Appl. Phys., vol. 99, p. 08Q902, 2006.
25. D. Suess, "Multilayer exchange spring for magnetic recording," Appl. Phys. Lett., vol. 89', p. 113105, 2006.
26. K. Z. Gao, J. Fernandez-De-Castro, and H. N. Bertram, "Micromagnetic study of the switching fields in polycrystalline magnetic thin-film media," IEEE Trans. Magn., vol. 41, no. 11, pp. 4236-4241, Nov. 2005.
27. T. Thomson, G. Hu, and B. D. Terris, "Intrinsic distribution of magnetic anisotropy in thin films probed by patterned nanostructures," Phys. Rev. Lett., vol. 96, p. 257204, 2006.
28. Y. Sonobe, K. K. Tham, T. Umezawa, C. Takasu, J. A. Dumaya, and P. Y. Leo, "Effect of continuous layer in CGC perpendicular recording media," J. Magn. Magn. Mater., vol. 303, pp. 292-295, 2006.
29. I. Tagawa and Y. Nakamura, "Relationships between high density recording performance and particle coercivity distribution," IEEE Trans. Magn., vol. 27, no. 6, pp. 4975-4977, Nov. 1991.