skip to main content

SciTech ConnectSciTech Connect

Title: Influence of tantalum underlayer on magnetization dynamics in Ni{sub 81}Fe{sub 19} films

The effect of tantalum (Ta) underlayer is investigated in Ni{sub 81}Fe{sub 19} thin films for magnetization dynamics. The damping parameters extracted from spin wave measurements increase systematically with increasing Ta thickness, whereas the damping parameters from ferromagnetic resonance measurements are found to be weakly dependent on the Ta thickness. The difference is attributed to propagating properties of spin wave and short spin diffusion length in Ta. The group velocity of spin waves is found to be constant for different Ta thicknesses, and nonreciprocity of spin waves is not affected by the Ta thickness. The experimental observations are supported by micromagnetic simulations.
Authors:
; ; ;  [1] ;  [2]
  1. Department of Electrical and Computer Engineering and NUSNNI, National University of Singapore, Singapore 117576 (Singapore)
  2. National Institute for Materials Science, Tsukuba 305–0047 (Japan)
Publication Date:
OSTI Identifier:
22483187
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DAMPING; DIFFUSION LENGTH; FERROMAGNETIC RESONANCE; MAGNETIZATION; SIMULATION; SPIN WAVES; TANTALUM; THICKNESS; THIN FILMS; VELOCITY