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Title: Control of the magnetic in-plane anisotropy in off-stoichiometric NiMnSb

NiMnSb is a ferromagnetic half-metal which, because of its rich anisotropy and very low Gilbert damping, is a promising candidate for applications in information technologies. We have investigated the in-plane anisotropy properties of thin, molecular beam epitaxy-grown NiMnSb films as a function of their Mn concentration. Using ferromagnetic resonance to determine the uniaxial and four-fold anisotropy fields, (2K{sub U})/(M{sub s}) and (2K{sub 1})/(M{sub s}) , we find that a variation in composition can change the strength of the four-fold anisotropy by more than an order of magnitude and cause a complete 90° rotation of the uniaxial anisotropy. This provides valuable flexibility in designing new device geometries.
Authors:
; ; ;  [1]
  1. Physikalisches Institut (EP3), Universität Würzburg, Am Hubland, D-97074 Würzburg (Germany)
Publication Date:
OSTI Identifier:
22277953
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 9; Other Information: (c) 2014 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; ANTIMONIDES; CONCENTRATION RATIO; FERROMAGNETIC MATERIALS; FERROMAGNETIC RESONANCE; FERROMAGNETISM; FLEXIBILITY; MANGANESE COMPOUNDS; MOLECULAR BEAM EPITAXY; NICKEL COMPOUNDS; STOICHIOMETRY; THIN FILMS