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

Journal Article · Fri Mar 28 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4869797· OSTI ID:22271155

Zhang, X. H.; Yin, Y.; Yuan, Q.; Han, J. C. ^[1]; Zhang, Z. H. ^[2]; Jian, J. K. ^[3]

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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)

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.

• OSTI ID: 22271155
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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