Structural transitions, magnetic properties, and electronic structures of Co(Fe)-doped MnNiSi compounds

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4916107· OSTI ID:22410006

Li, Y. ^[1]; Wei, Z. Y.; Wang, S. G.; Wang, W. H.; Wu, G. H. ^[1]; Liu, G. D. ^[2]

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1. State Key Laboratory for Magnetism, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
2. School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130 (China)

The structural transitions, magnetic properties, and electronic structures of Co(Fe)-doped MnNiSi compounds are investigated by x-ray powder diffraction, differential scanning calorimetry (DSC), magnetic measurements, and first-principles calculations. Results indicate that all samples undergo a martensitic transition from the Ni{sub 2}In-type parent phase to TiNiSi-type orthorhombic phase at high temperatures. The substitution of Co(Fe) for Mn in Mn{sub 1−x}Co{sub x}NiSi (x = 0.2, 0.3, and 0.4) and Mn{sub 1−y}Fe{sub y}NiSi (y = 0.26, 0.30, 0.36, 0.46, and 0.55) samples decreases the structural transition temperature and Curie temperature of martensite. The martensite phases show a typical ferromagnetic behavior with saturation field being basically unchanged with increasing Co(Fe) content, while the saturation magnetization shows a decreasing tendency. The theoretically calculated moments are in good agreement with the experimentally measured results. The orbital hybridizations between different 3d elements are analyzed from the distribution of density of states.

• OSTI ID: 22410006
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; 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

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALORIMETRY
COBALT COMPOUNDS
CONCENTRATION RATIO
CURIE POINT
DENSITY OF STATES
DOPED MATERIALS
ELECTRONIC STRUCTURE
IRON COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE COMPOUNDS
MARTENSITE
NICKEL SILICIDES
ORTHORHOMBIC LATTICES
PHASE TRANSFORMATIONS
X-RAY DIFFRACTION