‘Non-Gilbert-type’ damping of magnetic excitations in ultrathin ferromagnets: importance of magnon–magnon scattering
- 作者：Lindner ; J. ; Lenz ; K. ; Kosubek ; E. ; Baberschke ; K. ; Spoddig ; D. ; Meckenstock ; R. ; Pelzl ; J. ; Frait ; Z. ; et. al.
- 关键词：75.70.Cn ; 76.50.+g ; Ferromagnetic resonance ; Spin dynamics ; Magnetic superlattices ; Magnon&ndash ; magnon scattering
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2004
- 期刊代码：31_03048853
- 类别：ph
- 出版时间：May, 2004
- 卷：272-276
- 期：Supplement
- 页码：E1653-E1654
- 文件大小：177 K
摘要
Ferromagnetic resonance (FMR) measured over a large range of frequencies from 1–70GHz offers a unique possibility to study the dynamic response of ultrathin ferromagnetic films in the range from nano- to picoseconds. The linewidth of the FMR-signal is commonly believed to follow a linear ω-dependence, the so-called Gilbert-damping. Here we give first experimental evidence that in ultrathin films and interfaces ‘non-Gilbert-like’ damping, namely magnon–magnon scattering is equally important.