Abstract
First, a brief review of thermal decay of magnetization is given. Discussions on activation volume are presented in detail for longitudinal recording media. It is noted that the activation volume estimated based on waiting time methods is found to decrease with increasing reversing field for all the media under consideration. This result suggests that an activation volume in a written bit changes from place to place, depending upon on stray field due to a bit-transition. The recording noise is closely related to activation volume as well. Thermal stability of amorphous TbFeCo mono-layers and {TbFeCo/Pt} multilayers is studied by magnetic viscosity measurements M(t). Using, isothermal remanence measurements the relationship between the magnetization reversal process and its time dependence is investigated. The non-linear evolution of magnetization with In(time) takes place when the mechanism responsible for magnetization reversal process is mainly domain nucleation. On the other hand domain wall motion process induces a linear M(t) behavior. For multilayers with very small Pt thickness (samples with high square hysteresis loop), magnetization time decay can be described by a single energy barrier E B model. As Pt thickness increases, the distribution of E B becomes wider leading to almost linear magnetization decay with In(time) as in longitudinal recording media. Finally, the life time of written domains is discussed in terms of domain size. It is concluded that the difference between a pinning field and wall-field is a decisive factor for governing a life time.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Street, R. and Wooley, J.C. (1949) Proc. Phys. Soc London, Sect. A62, 562.
Néel, L (1949) Ann. Geophys. 5, 99.
Sharrock, M.P. and McKinney, J.T (1981), IEEE Trans. MAG.-17, 3020–3022
Sharrock, M.P. (1984). IEEE Trans. MAG.-20, 754–756
Meichle, L.S. and Victora, R.H. (1992) IEEE Trans. MAG-28, 3393–3397.
Lu, P and Charrap, S.U. (1994). IEEE Trans. MAG-30, 4230.
Lottis, D.K., Dahlberg, ED., Christner, JA., Lee, J.I., Peterson, R.L. and White, RM. (1990) J. Appl. Phys. 63, 2920.
Uesaka, Y., Nakatani, Y., Tanahashi, K., Tamai, I., Matsunuma, S. and Y. Tanahashi (1998) IEEE Trans.-MAG.-34, 1528.
Abana, ER, Glijer, P., Kisker, H., Okamoto, I. and Suzuki, T. (1997) J. Magn. Magn. Mat., 175, 148.
Moser, A.and Weller, D., (1999) IEEE Trans.MAG. 35, 2808–2813.
Hosoe, Y., Tamaki, I., Yamamoto, T., Manbe, T. and Yjima, Y. (1997) IEEE Trans. MAG-33, 3028–3030.
Uwazumi, H., Chen, J. and Judy, J.H. (1997) IEEE Trans. MAG-33, 3031–3033.
Harte, K.J. (1964) Spin-wave effects in the magnetization reversal of a thin ferromagnetic film, MIT Lincoln Lab. Technical Report #364.
Ishio, S. and Saito, J. (1998) SRC report.
Amett, P., Minvielle, T. and Nair, S. Presented at the 7th MRM meeting (Mastricht, The Netherlands, 1998).
Suzuki, T. Presented at 43rd M3(# DA-12, Miami, 1998).
Hoffmann, H. (1964) Phys. Stat. Sol. 5, 187.
Crew, DC, Farrant, S.H., McCormick, P.G. and Street, R. J. (1996) Mag.Magn.Mat. 163, 299
Wohlfarth, E.P. (1984) J. Phys. F:Met.Phys., L155–159, 14.
Gaunt, P. (1986) J. Appl. Phys. 59, 4129–4132.
Gaunt, P. (1977) J. Appl. Phys. 48, 3470.
Néel, L. (1950) J. Physique Radium 11, 49; (1951) J. Physique Radium 12, 339.
Bayreuther, G., Bruno, P., Lugert, G. and Turtur, C. (1989) Phys. Rev. B40, 7399.
Brown, S.D, Street, R., Chantrell, R., Hycock, P.W. and O’Grady, K. (1996) J. Appl. Phys. 79, 2594.
Lyberatos, A. and Chantrell, R.W. (1997) J. Phys. Condens. Matter. 9, 2623–2643
Oseroff, S.B., Franks, D., Tobin, V.M. and Schultz, S. (1987) IEEE Trans. MAG-23, 2871.
Scharrock, M.P. (1994) J. Appl. Phys. 76, 6413.
Bruno, P., Bayreuther, G., Beauvillian, P., Chappert, C, Lugert, G., Renard, D., Renard, J.P. and Sciden, J. (1990) J. Appl. Phys. 68(11) 5759–5766.
Suzuki, T. (1995) Scripta Metall.et. Mat. 33, 1609–1623; (1995) IEEE TransMAG-31, 4085.
Kronmuller, H., Durst, K.-D. and Sagaa, M. (1988) J.Mag.Mag.Mat. 74,291–302.
El Hilo, M., O’Grady, K, Pfeiffer, H., Chantrell, R.W. and Veitch, R.J. (1998) IEEE Trans. MAG-28, 2689.
Acharya, B.R, Suzuki, T. and Takano, K. (1999) IEEE TransMAG. 35, 2652–2654.
Sharrock, M.P and McKinney, J.T. (1997) IEEE Trans. MAG-33, 978–983.
Weiler, D. and Moose, M. Private communication. NS1C data for various samples to determine KV/kT.
Abarra, E.N., Phillips, G.N., Okamoto, I. and Suzuki, T. (1997) J. Magn. Soc. Jpn. 21, NoS-2, 291–296.
Zhang, Y. and Bertram, H.N. (1998) IEEE Trans. MAG.-34, No.5, 3786–3793.
Yamanaka, K., Yamamoto, T., Tanahashi, K., Inba, N, Hosoe, Y., Uesaka, Y. and Futamoto, M. (1886) J. Mag. Mag. Mat. 152, 411–416.
Chantrell, R.W., Hannary, J.D., Coverdale, G.N., Roberts, G.W. and Lyberatos, A. (1999) J. Magn. Soc. Japan 23, Noll, 2058–2063.
Lauhoff, G., Suzuki, T. and Acharya, R. (2000) J. Appl. Phys., 87(9), 5702–5704.
William, L. and Comstock, R.L. (1976) A.I.P.Conf. Proc., 5, 738
Maller, V.A. and Biddleton, B.K. (1974) Radio Electron. Eng., 44, 281
Lauhoff, G, Mochida, M.and Suzuki, T. (1999) Presented at the Annual Meeting of the Magnetics Society of Japan.
Choe, S.-B. and Shin, S.-C (1998) Phys. Rev. B, 57, 1085.
Chen, X. and Kryder, M.H. (1999) J.Appl. Phys., 85, 5006.
Thomson, T. and O’Grady, K. (1997) J.Phys. D: Appl. Phys., 30, 1566.
Huth, B.G. (1974) IBM J. Res. Developm., 18, 100.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2001 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Suzuki, T., Sbiaa, R., Birukawa, M., Itoh, Y., Lauhoff, G., Mochida, M. (2001). Thermal Stability in Magnetic and Magneto-Optical Recording Media. In: Hadjipanayis, G.C. (eds) Magnetic Storage Systems Beyond 2000. NATO Science Series, vol 41. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0624-8_14
Download citation
DOI: https://doi.org/10.1007/978-94-010-0624-8_14
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-0118-5
Online ISBN: 978-94-010-0624-8
eBook Packages: Springer Book Archive