Spin-glass-like behavior and negative thermal expansion in antiperovskite Mn{sub 3}Ni{sub 1−x}Cu{sub x}N compounds
- Center for Condensed Matter and Materials Physics, Department of Physics, Beihang University, 100191 Beijing (China)
- Univ. Grenoble Alpes, Inst NEEL, F-38000 Grenoble (France)
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, School of Renewable Energy, North China Electric Power University, Beijing 102206 (China)
The Cu-doping effect on the lattice and magnetic properties in Mn{sub 3}Ni{sub 1−x}Cu{sub x}N (x = 0, 0.3, 0.5, 0.7, 1.0) was extensively investigated. We observed that the Cu-doping at the Ni site complicated the magnetic ground states, which induced the competition of antiferromagnetic and ferromagnetic interactions. Spin-glass-like behavior, arising from possible site-randomness and competing interactions of magnetism, was observed in compounds with x = 0.3, 0.5, and 0.7, and typically discussed by means of the measurement of ac magnetic susceptibility for x = 0.7. The negative thermal expansion (NTE) behavior, due to the magnetic ordering transition, was observed in Mn{sub 3}Ni{sub 1−x}Cu{sub x}N compounds using variable temperature x-ray diffraction. It reveals that the introduction of Cu effectively broadens the temperature range displaying negative thermal expansion. The relationship between the local lattice distortion and the competing magnetic ground states might play an important role in broadening the NTE temperature range in this antiperovskite compound.
- OSTI ID:
- 22412869
- Journal Information:
- Journal of Applied Physics, Vol. 117, Issue 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CONCENTRATION RATIO
COPPER COMPOUNDS
FERROMAGNETISM
GROUND STATES
INDIUM COMPOUNDS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MANGANESE COMPOUNDS
NICKEL NITRIDES
RANDOMNESS
SPIN GLASS STATE
THERMAL EXPANSION
X-RAY DIFFRACTION