First principles approach to the magneto caloric effect: Application to Ni2MnGa

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3562199· OSTI ID:1018650

Nicholson, Don M ^[1]; Odbadrakh, Khorgolkhuu ^[1]; Rusanu, Aurelian ^[1]; Eisenbach, Markus ^[1]; Brown, Greg ^[1]; Evans, III, Boyd Mccutchen ^[1]

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1. ORNL

The magneto-caloric effect (MCE) is a possible route to more efficient heating and cooling of residential and commercial buildings. The search for improved materials is important to the development of a viable MCE based heat pump technology. We have calculated the magnetic structure of a candidate MCE material: Ni2MnGa. The density of magnetic states was calculated with the Wang Landau statistical method utilizing energies fit to those of the locally self-consistent multiple scattering method. The relationships between the density of magnetic states and the field induced adiabatic temperature change and the isothermal entropy change are discussed. (C) 2011 American Institute of Physics.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). National Center for Computational Sciences (NCCS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1018650
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 7; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COMMERCIAL BUILDINGS
ENTROPY
HEAT PUMPS
HEATING
MULTIPLE SCATTERING