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Title: Compositional dependence of the magnetic properties of epitaxial FeV/MgO thin films

Owing to their bcc structures and the low lattice misfit with MgO, FeV alloys are interesting for MgO-based magnetic tunnel junctions. We use vector network analyzer ferromagnetic resonance to measure the magnetization, anisotropy, exchange stiffness, and damping of epitaxial FeV/MgO thin alloys of various V contents. The low magnetization, very high exchange stiffness (23 pJ/m) and very low effective damping (<0.0026) of the alloy with 20% V content makes it an interesting candidate for spin torque applications. The ultralow damping is consistent with a spin-orbit origin, which sheds light on the possible strategies to reduce the damping in alloys.
Authors:
;  [1] ;  [2] ;  [3] ; ;  [4]
  1. Institut d'Electronique Fondamentale, CNRS, UMR 8622, Orsay (France)
  2. (France)
  3. IMEC, Kapeldreef 75, B-3001 Leuven (Belgium)
  4. Institut Jean Lamour, CNRS - Universite de Lorraine, Boulevard des aiguillettes BP 70239, F-54506 Vandoeuvre le‘s Nancy (France)
Publication Date:
OSTI Identifier:
22253811
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; BCC LATTICES; DAMPING; EPITAXY; FERROMAGNETIC RESONANCE; FLEXIBILITY; MAGNESIUM OXIDES; MAGNETIC PROPERTIES; SPIN; SUPERCONDUCTING JUNCTIONS; THIN FILMS