Optimization of the magnetocaloric effect in Ni-Mn-In alloys: A theoretical study

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776112090142· OSTI ID:22069307

Sokolovskiy, V V; Entel, P ^[1]

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1. University of Duisburg-Essen, Faculty of Physics and CeNIDE (Germany)

Based on ab initio and Monte Carlo simulations, we study the influence of the strength of the magnetic exchange parameters on the inverse and conventional magnetocaloric effect in the Ni{sub 50}Mn{sub 34}In{sub 16} Heusler alloy using the mixed Potts and Blume-Emery-Griffiths model Hamiltonian. Within the proposed model, the temperature dependences of the magnetization, tetragonal deformation, and adiabatic temperature changes for magnetic field variation are obtained. It is first shown that a decrease in the magnetic exchange interactions leads to increased values of the magnetocaloric effect. We suppose that a reduction of the exchange interactions in the Ni-Mn-In alloy can be realized by the doping with nonmagnetic atoms such as B, Si, Zn, Cu, etc.

• OSTI ID: 22069307
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 115, Issue 4; Other Information: Copyright (c) 2012 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPUTERIZED SIMULATION
DEFORMATION
EXCHANGE INTERACTIONS
HAMILTONIANS
HEUSLER ALLOYS
INDIUM ALLOYS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE ALLOYS
MONTE CARLO METHOD
NICKEL ALLOYS
SILICON ADDITIONS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
VARIATIONS
ZINC ADDITIONS