Ferromagnetic resonance linewidth and two-magnon scattering in Fe1-xGdx thin films

被引：29

作者：

Jiang, Sheng ^{[1
]}

Sun, Li ^{[1
,2
]}

Yin, Yuli ^{[1
]}

Fu, Yu ^{[1
]}

Luo, Chen ^{[1
]}

Zhai, Ya ^{[1
]}

Zhai, Hongru ^{[3
,4
]}

机构：

[1] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China

[2] Hainan Normal Univ, Coll Phys & Elect Engn, Haikou 571158, Peoples R China

[3] Nanjing Univ, Natl Lab Solid Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[4] Nanjing Univ, Ctr Modern Anal, Nanjing 210093, Jiangsu, Peoples R China

来源：

AIP ADVANCES | 2017年 / 7卷 / 05期

关键词：

MAGNETIC-PROPERTIES; ULTRATHIN FILMS;

D O I：

10.1063/1.4978004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Magnetization dynamics of Fe1-xGdx thin films (0 <= x <= 22%) has been investigated by ferromagnetic resonance (FMR). Out-of-plane magnetic field orientation dependence of resonance field and linewidth has been measured. Resonance field and FMR linewidth have been fitted by the free energy of our system and Landau-Lifshitz-Gilbert (LLG) equation. It is found that FMR linewidth contains huge extrinsic components including two-magnon scattering contribution and inhomogeneous broadening for FeGd alloy thin films. In addition, the intrinsic linewidth and real damping constants have been obtained by extracting the extrinsic linewidth. The damping constant enhanced from 0.011 to 0.038 as Gd dopants increase from 0 to 22% which originates from the enhancement of L-S coupling in FeGd thin films. Besides, gyromagnetic ratio, Lande factor g and magnetic anisotropy of our films have also been determined. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

引用

页数：7

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