Tuning of the Magnetic Damping Parameter by Varying Cr Composition in Fe1-xCrx Alloy

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES
• 页码范围: 92-97
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/10/107502

摘要

We investigate the magnetic damping parameter of Fe1-xCrx thin films using the time-resolved magneto-optical Kerr effect technique.It is demonstrated that the overall effective damping parameter is enhanced with the increasing Cr concentration.The effective damping at high field α0 is found to be significantly enhanced when increasing the Cr concentration with the α0 =0.159 in the Fe45Cr55 enhanced by 562％ compared with that of α0 =0.024 in the pure Fe film.This study provides a new approach of controlling the effective damping parameter with a desired magnitude via varying Cr composition.