skip to main content

Title: Thickness- and temperature-dependent magnetodynamic properties of yttrium iron garnet thin films

The magnetodynamical properties of nanometer-thick yttrium iron garnet films are studied using ferromagnetic resonance as a function of temperature. The films were grown on gadolinium gallium garnet substrates by pulsed laser deposition. First, we found that the damping coefficient increases as the temperature increases for different film thicknesses. Second, we found two different dependencies of the damping on film thickness: at room temperature, the damping coefficient increases as the film thickness decreases, while at T = 8 K, we find the damping to depend only weakly on the thickness. We attribute this behavior to an enhancement of the relaxation of the magnetization by impurities or defects at the surfaces.
Authors:
; ; ;  [1] ;  [2] ;  [1] ;  [3]
  1. Department of Physics, University of Gothenburg, 41296 Gothenburg (Sweden)
  2. Department of Integrated Devices and Circuits, School of ICT, Royal Institute of Technology (KTH), 16440 Kista (Sweden)
  3. (KTH), 16440 Kista (Sweden)
Publication Date:
OSTI Identifier:
22410055
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DAMPING; ENERGY BEAM DEPOSITION; FERRITE GARNETS; FERROMAGNETIC RESONANCE; GADOLINIUM COMPOUNDS; GALLIUM OXIDES; LASER RADIATION; MAGNETIZATION; PULSED IRRADIATION; RELAXATION; SUBSTRATES; SURFACES; TEMPERATURE DEPENDENCE; THICKNESS; THIN FILMS; YTTRIUM