X-ray detected ferromagnetic resonance techniques for the study of magnetization dynamics

被引:2
|
作者
van der Laan, Gerrit [1 ]
Hesjedal, Thorsten [2 ]
机构
[1] Harwell Sci & Innovat Campus, Diamond Light Source, Didcot OX11 0DE, Oxon, England
[2] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, Oxon, England
来源
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2023年 / 540卷
关键词
FMR; XMCD; X-ray scattering; X-ray reflectivity; Spin structures; PRECESSION; DICHROISM;
D O I
10.1016/j.nimb.2023.04.005
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
Element-specific spectroscopies using synchrotron-radiation can provide unique insights into materials proper-ties. The recently developed technique of X-ray detected ferromagnetic resonance (XFMR) allows studying the magnetization dynamics of magnetic spin structures. Magnetic sensitivity in XFMR is obtained from the X-ray magnetic circular dichroism (XMCD) effect, where the phase of the magnetization precession of each magnetic layer with respect to the exciting radio frequency is obtained using stroboscopic probing of the spin precession. Measurement of both amplitude and phase response in the magnetic layers as a function of bias field can give a clear signature of spin-transfer torque (STT) coupling between ferromagnetic layers due to spin pumping. In the last few years, there have been new developments utilizing X-ray scattering techniques to reveal the precessional magnetization dynamics of ordered spin structures in the GHz frequency range. The techniques of diffraction and reflectometry ferromagnetic resonance (DFMR and RFMR) provide novel ways for the probing of the dynamics of chiral and multilayered magnetic materials, thereby accessing key information relevant to the engineering and development of high-density and low-energy consumption data processing solutions.
引用
收藏
页码:85 / 93
页数:9
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