Element-resolved x-ray ferrimagnetic and ferromagnetic resonance spectroscopy

被引：24

作者：

Boero, G. ^{[5
]}

Mouaziz, S. ^{[5
]}

Rusponi, S. ^{[5
]}

Bencok, P. ^{[4
]}

Nolting, F. ^{[3
]}

Stepanow, S. ^{[1
]}

Gambardella, P. ^{[1
,2
]}

机构：

[1] Ctr Invest Nanociencia Nanotecnol CIN ICN 2, E-08193 Barcelona, Spain

[2] ICREA, E-08010 Barcelona, Spain

[3] Paul Scherrer Inst, SLS, CH-5232 Villigen, Switzerland

[4] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[5] Ecole Polytech Fed Lausanne, CH-1015 Lausanne, Switzerland

来源：

NEW JOURNAL OF PHYSICS | 2008年 / 10卷

关键词：

D O I：

10.1088/1367-2630/10/1/013011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the measurement of element-specific magnetic resonance spectra at gigahertz frequencies using x-ray magnetic circular dichroism (XMCD). We investigate the ferrimagnetic precession of Gd and Fe ions in Gd-substituted yttrium iron garnet, showing that the resonant field and linewidth of Gd precisely coincide with Fe up to the nonlinear regime of parametric excitations. The opposite sign of the Gd x-ray magnetic resonance signal with respect to Fe is consistent with dynamic antiferromagnetic alignment of the two ionic species. Further, we investigate a bilayer metal film, Ni80Fe20(5 nm)/Ni(50 nm), where the coupled resonance modes of Ni and Ni80Fe20 are separately resolved, revealing shifts in the resonance fields of individual layers but no mutual driving effects. Energy-dependent dynamic XMCD measurements are introduced, combining x-ray absorption and magnetic resonance spectroscopies.

引用

页数：16

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