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Title: Perpendicular magnetic anisotropy in Mn{sub 2}CoAl thin film

Heusler compound Mn{sub 2}CoAl (MCA) is attracting more attentions due to many novel properties, such as high resistance, semiconducting behavior and suggestion as a spin-gapless material with a low magnetic moment. In this work, Mn{sub 2}CoAl epitaxial thin film was prepared on MgO(100) substrate by magnetron sputtering. The transport property of the film exhibits a semiconducting-like behavior. Moreover, our research reveals that perpendicular magnetic anisotropy (PMA) can be induced in very thin Mn{sub 2}CoAl films resulting from Mn-O and Co-O bonding at Mn{sub 2}CoAl/MgO interface, which coincides with a recent theoretical prediction. PMA and low saturation magnetic moment could lead to large spin-transfer torque with low current density in principle, and thus our work may bring some unanticipated Heusler compounds into spintronics topics such as the domain wall motion and the current-induced magnetization reversal.
Authors:
; ; ;  [1] ; ;  [2]
  1. Shanghai Key Laboratory of Special Artificial Microstructure and Pohl Institute of Solid State Physics and School of Physics Science and Engineering, Tongji University, Shanghai 200092 (China)
  2. School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048 (China)
Publication Date:
OSTI Identifier:
22492387
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 1; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; ANISOTROPY; COBALT ALLOYS; CRYSTAL STRUCTURE; CURRENT DENSITY; DOMAIN STRUCTURE; EPITAXY; INTERFACES; MAGNESIUM OXIDES; MAGNETIC MOMENTS; MAGNETIZATION; MAGNETRONS; MANGANESE BASE ALLOYS; SPIN; SPUTTERING; SUBSTRATES; THIN FILMS; TORQUE