skip to main content

DOE PAGESDOE PAGES

Title: Ferromagnetic resonance of a YIG film in the low frequency regime

Here, an improved method for characterizing the magnetic anisotropy of films with cubic symmetry is described and is applied to an yttrium iron garnet (111) film. Analysis of the ferromagnetic resonance (FMR) spectra performed both in-plane and out-of-plane from 0.7 to 8 GHz yielded the magnetic anisotropy constants as well as the saturation magnetization. The field at which FMR is observed turns out to be quite sensitive to anisotropy constants (by more than a factor ten) in the low frequency (<2 GHz) regime, and when the orientation of the magnetic field is nearly normal to the sample plane; the restoring force on the magnetization arising from the magnetocrystalline anisotropy fields is then comparable to that from the external field, thereby allowing the anisotropy constants to be determined with greater accuracy. In this region, unusual dynamical behaviors are observed such as multiple resonances and a switching of FMR resonance with only a 1° change in field orientation at 0.7 GHz.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [5] ;  [5] ;  [2]
  1. Hanyang Univ., Seoul (Korea, Republic of). Research Inst. for Natural Sciences and Dept. of Physics
  2. Northwestern Univ., Evanston, IL (United States). Dept. of Physics and Astronomy
  3. Chang Jung Christian Univ., Tainan (Taiwan). Dept. of Engineering and Management of Advanced Technology
  4. Hallym Univ., Chuncheon (Korea, Republic of). Dept. of Materials Science and Engineering
  5. Univ. of Electronic Science and Technology of China, Chengdu (China). State Key Lab. of Electronic Films and Integrated Devices
Publication Date:
Grant/Contract Number:
SC0014424; DMR-1507058; 51272036; 51472046; NRF-2015R1A4A1041631; HRF-201508-012
Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 120; Journal Issue: 3; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Research Org:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Science Foundation (NSF); National Natural Science Foundation of China (NNSFC); National Research Foundation of Korea (NRF)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; magnetic resonance; external field; Zeeman effect; garnet; magnetic films; epitaxy; anisotropy; magnetic anisotropy; magnetic fields; free energy
OSTI Identifier:
1467835
Alternate Identifier(s):
OSTI ID: 1267529