Dynamical effect in measurement of the exchange-bias field: A consequence of the slow-relaxer mechanism

被引：8

作者：

Gloanec, M. ^{[1
]}

Rioual, S. ^{[1
]}

Lescop, B. ^{[1
]}

Zuberek, R. ^{[2
]}

Szymczak, R. ^{[2
]}

Aleshkevych, P. ^{[2
]}

Rouvellou, B. ^{[1
]}

机构：

[1] Univ Bretagne Occidentale, Lab Magnetisme Bretagne, CNRS, FRE 3117, F-29285 Brest, France

[2] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 22期

关键词：

ferromagnetic resonance; iron alloys; magnetic anisotropy; magnetic domain walls; magnetic multilayers; manganese alloys; nickel alloys; YTTRIUM IRON GARNET; FERROMAGNETIC-RESONANCE; TEMPERATURE-DEPENDENCE; RELAXATION; FILMS;

D O I：

10.1103/PhysRevB.80.220404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the temperature dependence of ferromagnetic resonance (FMR) measurements on NiFe/FeMn bilayer. This includes investigations about the angular distribution of the resonance, H(R), and that of the linewidth, Delta H. By considering the domain-wall formation model, the exchange-bias field, H(EB,FMR), is derived from the FMR measurements. The disagreements observed at low temperature between these values and the ones obtained from superconducting quantum interference device measurements, H(EB,SQUID), are discussed. We demonstrate that the negative line shift and the maximum of the linewidth of the FMR line are both perfectly interpreted through the slow-relaxer mechanism. This enabled us to elucidate the intriguing question about the yielding to different values of the exchange-bias anisotropy by both techniques.

引用

页数：4

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