Low-frequency response in the magnetic susceptibility of antiferromagnetically coupled Fe/Cr multilayers

被引：2
|
作者：
Aliev, FG
Martinez, JL
Moshchalkov, VV
Bruynseraede, Y
Levanyuk, AP
Villar, R
机构：
[1] Univ Autonoma Madrid, Inst Cinecia Mat Nicolas Cabrera, Dept Fis Mat Condensada, E-28049 Madrid, Spain
[2] CSIC, ICMM, E-28049 Madrid, Spain
[3] Katholieke Univ Leuven, Vaste Stof Fys Magnetisme Lab, B-3001 Louvain, Belgium
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 240卷 / 1-3期
关键词：
multilayers; susceptibility-AC; domain wall dynamics; relaxation;
D O I：
10.1016/S0304-8853(01)00887-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The magnetic field and temperature dependence of the low-frequency (f < 10(4) Hz) in- and out-of-phase magnetic response of antiferromagnetically coupled Fe/Cr(1 0 0) shows that at T > 100 K both the real (chi') and imaginary (chi") parts of the susceptibility exhibit hysteretic dependence on the magnetic field with maxima of chi"(H) at H approximate to +/-25 Oe. At T = 2 K the losses exhibit an unusual strong frequency dependence describable within a single relaxation time scheme. The corresponding relaxation time proves to be strongly field-dependent which could be related to some quantum tunneling processes at low temperatures. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：501 / 503
页数：3
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