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Title: Magnetoresistance reversal in antiperovskite compound Mn{sub 3}Cu{sub 0.5}Zn{sub 0.5}N

We report detailed investigations of the structure, magnetic properties, electronic transport, and specific heat in Mn-based antiperovskite compounds Mn{sub 3}Cu{sub 0.5}Zn{sub 0.5}N. Most strikingly, there are several fascinating features: (i) The magnetoresistance at 30 kOe (40 kOe) exceeds ∼1% (∼2%) over a temperature span of ∼70 K (∼25 K) from 5 to 140 K; (ii) magnetoresistance fluctuates at temperatures of 100–200 K, including an obvious sign reversal from negative to positive at ∼140 K. Analysis of the specific heat reveals that the magnetoresistance reversal may originate from the reconstruction of the Fermi surface accompanying an antiferromagnetic-ferromagnetic transition.
Authors:
; ; ;  [1] ;  [2] ;  [3] ; ;  [4]
  1. Center for Composite Materials, Harbin Institute of Technology, Harbin 150080 (China)
  2. Liaoning Key Materials Laboratory for Railway, School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028 (China)
  3. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006 (China)
  4. Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080 (China)
Publication Date:
OSTI Identifier:
22271155
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 12; 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; ANTIFERROMAGNETISM; COPPER COMPOUNDS; CRYSTAL STRUCTURE; FERMI LEVEL; FERROMAGNETISM; MAGNETIC PROPERTIES; MAGNETORESISTANCE; MANGANESE COMPOUNDS; PHASE TRANSFORMATIONS; SPECIFIC HEAT; TEMPERATURE DEPENDENCE; ZINC NITRIDES