How antiferromagnetic coupling can stabilize recorded information

IEEE Transactions on Magnetics

Volumn 38, Issue 5 I, 2002, Pages 1867-1872

  Richter, Hans J ^a   Girt, E ^a  

^a SEAGATE TECHNOLOGY   (United States)

Author keywords

Antiferromagnetically coupled media; Superparamagnetism; Thermal stability

Indexed keywords

ANTIFERROELECTRIC MATERIALS; MAGNETIC RECORDING; MAGNETIC STORAGE; MAGNETIZATION; SIGNAL TO NOISE RATIO; SUPERPARAMAGNETISM; THERMODYNAMIC STABILITY;

ANTIFERROMAGNETIC COUPLING (AFC);

MAGNETIC COUPLINGS;

EID: 0036761641     PISSN: 00189464     EISSN: None     Source Type: Journal    
DOI: 10.1109/TMAG.2002.801785     Document Type: Article

References (24)

1. 2 and beyond," IEEE Trans. Magn., vol. 35, pp. 2790-2795, Sept. 1999.
2. D. Weller and A. Moser, "Thermal effect limits in ultrahigh-density magnetic recording," IEEE Trans. Magn., vol. 35, pp. 4423-4439, Sept. 1999.
3. 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, Oct. 2000.
4. 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, Dec. 2000.
5. E.N. Abarra, B.R. Acharya, A. Iuomata, and I. Okamoto, "Synthetic ferrimagnetic media," IEEE Trans. Magn., vol. 37, pp. 1426-1431, July 2001.
6. S.S.P. Parkin, "Systematic variation of the strength and oscillation period of indirect magnetic exchange coupling through the 3d, 4d, and 5d transition metals," Phys. Rev. Lett., vol. 67, pp. 3598-3601, Dec. 1991.
7. H.J. Richter and E. Girt, "Recording potential of antiferromagnetically coupled longitudinal media," IEEE Trans. Magn., vol. 37, pp. 1441-1444, July 2001.
8. H.J. Richter, E. Girt, and H. Zhou, "Simplified analysis of two-layer AFC media," Appl. Phys. Lett., vol. 80, pp. 2529-2531, Apr. 2002.
9. H.J. Richter and E. Girt, "Magnetization processes in two-layer antiferromagnetically coupled media,", to be published.
10. E.C. Stoner and E.P. Wohlfarth, "A mechanism of magnetic hysteresis in heterogeneous alloys," Phil. Trans. Roy. Soc., vol. A240, pp. 599-642, May 1948.
11. W.F. Brown, Jr., Magnetostatic Principles in Ferromagnetism. Amsterdam: North Holland, 1962.
12. M.E. Schabes, E.E. Fullerton, and D.T. Margulies, "Theory of antiferromagnetically coupled recording media," IEEE Trans. Magn., vol. 37, pp. 1432-1434, July 2001.
13. L. Guan and J.G. Zhu, "Analysis of thermal stability enhancement in double layer antiferromagnetically coupled media," J. Appl. Phys., vol. 91, pp. 7688-7690, May 2002.
14. C.P. Bean and J.D. Livingston, "Superparamagnetism," J. Appl. Phys, vol. 30, no. Suppl, pp. 120S-129S, Apr. 1959.
15. A. Hahn, "Die superparamagnetische Anfangssuszeptibilität bei beliebiger Anisotropie der Einzelkörner," Z. Angew. Physik, vol. 13, pp. 165-167, 1961.
16. D.T. Margulies, M.E. Schabes, W. McChesney, and E.E. Fullerton, "Interlayer coupling and magnetic reversal of antiferromagnetically coupled media," Appl. Phys. Lett., vol. 80, pp. 91-93, Jan. 2002.
17. H.J. Richter, S.Z. Wu, and R.K. Malmhäll, "Dynamic coercivity effects in thin-film media," IEEE Trans. Magn., vol. 34, pp. 1540-1542, July 1998.
18. H.N. Bertram and H.J. Richter, "Arrhenius-Neel thermal decay in polycrystalline thin-film media," J. Appl. Phys., vol. 85, pp. 4991-4993, April 1999.
19. S.I. Woods, J.R. Kirtley, S. Sun, and R.H. Koch, "Direct investigation of superparamagnetism in Co nanoparticle films," Phys. Rev. Lett., vol. 87, pp. 137 205-137 208, Sept. 2001.
20. J. Lohau, A. Moser, D.T. Margulies, E.E. Fullerton, and M.E. Schabes, "Dynamic coercivity measurements of antiferromagnetically coupled media layers," Appl. Phys. Lett., vol. 78, pp. 2748-2750, Apr. 2001.
21. B. Slutsky and H.N. Bertram, "Transition noise analysis of thin film magnetic recording media," IEEE Trans Magn., vol. 30, pp. 2808-2817, Sept. 1994.
22. E. Girt and H.J. Richter, to be published.
23. Y. Hsu, J.G. Zhu, J.M. Sievertsen, and J.H. Judy, "Magnetization cross-track correlations and transition noise of longitudinal thin film media," IEEE Trans Magn., vol. 28, pp. 3273-3275, Sept. 1992.
24. 2," IEEE Trans. Magn., vol. 38, pp. 1861-1866, Sept. 2002.