Anti-ferromagnetically coupled soft underlayer

Details Anti-ferromagnetically coupled soft underlayer Anti-ferromagnetically coupled soft underlayer

2005-09-22

2010-02-23

Sample, David R (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S827000, C428S828000, C428S829000, C428S830000

Reexamination Certificate

active

07666529

ABSTRACT:
A magnetic recording medium having a first magnetic layer, a spacer layer, and a second magnetic layer, in this order, wherein the spacer layer includes a non-magnetic layer and a thickness of the spacer layer is selected to establish anti-ferromagnetic coupling between the first magnetic layer and the second magnetic layer, and a thickness of both the first and second magnetic layers are less than a critical thickness for formation of stripe domains in the magnetic layers is disclosed.

REFERENCES:
patent: 4576876 (1986-03-01), Shiiki et al.
patent: 6077586 (2000-06-01), Bian et al.
patent: 6280813 (2001-08-01), Carey et al.
patent: 6372330 (2002-04-01), Do et al.
patent: 2002/0028356 (2002-03-01), Kawato et al.
patent: 2002/0028357 (2002-03-01), Shukh et al.
patent: 2002/0076579 (2002-06-01), Hanawa et al.
patent: 2003/0035973 (2003-02-01), Trindade et al.
patent: 2004/0062953 (2004-04-01), Futamoto et al.
patent: 2004/0137278 (2004-07-01), Uwazumi et al.
patent: 2005/0244679 (2005-11-01), Arai et al.
patent: 58166531 (1983-10-01), None
patent: 2004118894 (2004-04-01), None
patent: 2003/049086 (2003-06-01), None
W.Ervens and H. Wilmesmeier. Ullmann's Encyclopedia of Industrial Chemistry, Magnetic Materials. DOI: 10.1002/14356007.a16—001. Article Online Posting Date: Jun. 15, 2000.
Acharya, B.R.; Zhou, J.N.; Zheng, M.; Choe, G.; Abarra, E.N.; Johnson, K.E., “Anti-parallel coupled soft under layers for high-density perpendicular recording,” Magnetics, IEEE Transactions on , vol. 40, No. 4, pp. 2383-2385, Jul. 2004.
Kong, S.H.; Okamoto, T.; Nakagawa, S., “Soft magnetic underlayer with multilayer structure for penpendicular magnetic recording media,” Magnetics, IEEE Transactions on , vol. 39, No. 5, pp. 2338-2340, Sep. 2003.
Kikukawa, A.; Honda, Y.; Hirayama, Y.; Futamoto, M., “Noise characteristics of double-layered perpendicular media using novel soft magnetic underlaryer materials,” Magnetics, IEEE Transactions on , vol. 36, No. 5, pp. 2402-2404, Sep. 2000.

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