TY - JOUR
T1 - Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces
AU - Zhang, S.
AU - Dimitrov, D. V.
AU - Hadjipanayis, G. C.
AU - Cai, J. W.
AU - Chien, C. L.
N1 - Funding Information:
This work is supported by a MURI-ONR grant N00014-96-1-1207 (S.Z.), a grant from NSF DMR-9307676 (D.V.D. and G.C.H.) and NSF MRSEC Program No. 96-32526 (J.W.C. and C.L.C.).
PY - 1999/6/1
Y1 - 1999/6/1
N2 - In the presence of random fields at an interface between a ferromagnetic and an antiferromagnetic layer, the domain walls in the ferromagnetic layer are pinned by local minimum energy. To move the domain walls, an applied magnetic field must be large enough to overcome statistically fluctuating energy. We have calculated this energy and found that the coercivity can be as large as a few kOe for a thin ferromagnetic layer. It is also found that the coercive field at low temperature scales as 1/t3/2 where t is the F layer thickness, and the coercive field decreases strongly with temperature.
AB - In the presence of random fields at an interface between a ferromagnetic and an antiferromagnetic layer, the domain walls in the ferromagnetic layer are pinned by local minimum energy. To move the domain walls, an applied magnetic field must be large enough to overcome statistically fluctuating energy. We have calculated this energy and found that the coercivity can be as large as a few kOe for a thin ferromagnetic layer. It is also found that the coercive field at low temperature scales as 1/t3/2 where t is the F layer thickness, and the coercive field decreases strongly with temperature.
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U2 - 10.1016/S0304-8853(98)01155-X
DO - 10.1016/S0304-8853(98)01155-X
M3 - Conference article
AN - SCOPUS:0032666592
VL - 198
SP - 468
EP - 470
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
T2 - Proceedings of the 1998 3rd International Symposium on Metallic Multilayers (MML-98)
Y2 - 14 June 1998 through 19 June 1998
ER -