Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2006-08-29
2006-08-29
Evans, Jefferson (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C360S324200
Reexamination Certificate
active
07099122
ABSTRACT:
A spin polarization enhancement artificial (SPEA) magnet comprises combinations of positive spin asymmetry interfaces and inverse spin asymmetry interfaces arranged antiferromagnetically such that current passed through the SPEA magnet has enhanced spin polarization. The SPEA magnet additionally may combine bulk material properties of electron scattering to either supplement or replace the interfacial spin differentiation. A basic functional unit of the SPEA magnet includes two ferromagnetic layers separated by two spacer layers. Each spacer forms an interface such that adjacent ferromagnetic layers produce different spin symmetry. Antiferromagnetic arrangement of adjacent ferromagnetic layers coordinates the different spin symmetries such that a single spin state is selected and also provides additional stabilization to the SPEA magnet.
REFERENCES:
patent: 5654566 (1997-08-01), Johnson
patent: 5764567 (1998-06-01), Parkin
patent: 5801984 (1998-09-01), Parkin
patent: 6081115 (2000-06-01), Mukasa et al.
patent: 6396669 (2002-05-01), Gill
patent: 6421212 (2002-07-01), Gibbons et al.
patent: 6445554 (2002-09-01), Dong et al.
patent: 6538856 (2003-03-01), Gill
patent: 6580588 (2003-06-01), Gill
patent: 6600314 (2003-07-01), Kou
patent: 6683762 (2004-01-01), Li et al.
patent: 6953601 (2005-10-01), Li et al.
patent: 2002/0036876 (2002-03-01), Kawawake et al.
patent: 2002/0051897 (2002-05-01), Saito et al.
patent: 2002/0097538 (2002-07-01), Seyama et al.
patent: 2003/0011463 (2003-01-01), Iwasaki et al.
patent: 2003/0030945 (2003-02-01), Heinonen et al.
patent: 2003/0072111 (2003-04-01), Hasegawa et al.
patent: 2003/0103299 (2003-06-01), Saito
patent: 2004/0109350 (2004-06-01), Epstein
patent: 2004/0178460 (2004-09-01), Lee et al.
patent: 2005/0111145 (2005-05-01), Yuasa et al.
patent: 2005/0280953 (2005-12-01), Hasegawa et al.
M. D. Stiles and D. R. Penn, Calculation of spin-dependent interface resistance, Feb. 1, 2000, pp. 3200-3202, vol. 61, No. 5.
E. C. Anderson and M. B. Stearns, Magnetic behavior and morphology of evaporated Fe/Mo multilayered thin films (abstract), Journal of Applied Physics, May 15, 1993, vol. 73 I. 10, p. 5985.
J.-P. Renard, P. Bruno, R. Megy, B. Bartenlian, P. Beauvillain, C. Chappert, C. Dupas, E. Kolb, M. Mulloy, J. Prieur, P. Veillet, and E. Velu, Inverse giant magnetoresistance (invited) Journal of Applied Physics 79, Apr. 15, 1996, pp. 5270-5275.
C. Vouille, A. Fert, and A. Barthelemy, S. Y. Hsu, R. Loloee, and P. A. Schroeder, Inverse CPP-GMR in (A/Cu/Co/Cu) multilayers (A=NiCr, FeCr, FeV) and discussion of the spin asymmetry induced by impurities, Journal of Applied Physics 81, Apr. 15, 1997, pp. 4573-4575.
W. Park, R. Loloee, J. A. Caballero, W. P.Pratt, Jr., P. A. Schroeder, and J. Bass, A. Fert and C. Vouille; Test of unified picture of spin-dependent transport in perpendicular (CPP) giant magnetoresistance and bulk alloys, Journal of Applied Physics, vol. 85, Apr. 15, pp. 4542-4544.
C. Vouille, A. Barthelemy, F. Elokan Mpondo, and A. Fert, P. A. Schroeder, S. Y. Hsu, A. Reilly, and R. Loloee, Microscopic mechanisms of giant magnetoresistance, Physical Review B, vol. 60, Sep. 1, 1999, pp. 6710-6722.
Lamberton Robert W.
McLaughlin Thomas K.
Murdoch Susan Jane Tara
O'Kane William J.
Yi Ge
Evans Jefferson
Kinney & Lange , P.A.
Seagate Technology LLC
LandOfFree
Spin polarization enhancement artificial magnet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spin polarization enhancement artificial magnet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin polarization enhancement artificial magnet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3655534