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Title: Lattice relaxation studies in strained epitaxial Fe-Co-C films

Aiming at high magnetocrystalline anisotropies, small additions of carbon have been proposed to stabilize a tetragonal lattice distortion in Fe-Co. In the present work, the relaxation mechanisms of Fe-Co films containing 2 at. % C are examined in detail. Film growth on buffers with different lattice constants is compared by a combination of in situ reflection high energy electron diffraction and ex-situ X-ray diffraction measurements. It is shown that relaxation starts at a thickness around 2 nm and ends at a distortion of about 4%, which is independent from the chosen buffer. Integral XRD and magnetization measurements suggest that the relaxation occurs over the complete film thickness.
Authors:
;  [1] ;  [2] ;  [1]
  1. IFW Dresden, P.O. Box 270116, 01171 Dresden (Germany)
  2. (Germany)
Publication Date:
OSTI Identifier:
22410022
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; ANISOTROPY; CARBON; COBALT; COMPARATIVE EVALUATIONS; ELECTRON DIFFRACTION; EPITAXY; FILMS; IRON; LATTICE PARAMETERS; MAGNETIZATION; REFLECTION; RELAXATION; STRAINS; TETRAGONAL LATTICES; X-RAY DIFFRACTION