Anisotropy of the magnetocaloric effect: Example of Mn 5 Ge 3

Maraytta, N.; Voigt, J.; Friese, K.; Salazar Mejía, C.; Perßon, J.; Salman, S. M.; Skourski, Y.; Brückel, Th.

doi:10.1063/5.0020780

Journal Article

FZJ-2020-03165

Anisotropy of the magnetocaloric effect: Example of Mn 5 Ge 3

Maraytta, N.FZJ* ; Voigt, J.FZJ* ; Salazar Mejía, C. ; Friese, K. (Corresponding author)FZJ* ; Skourski, Y. ; Perßon, J.FZJ* ; Salman, S. M. ; Brückel, T.FZJ*

2020
American Inst. of Physics Melville, NY

Journal of applied physics 128(10), 103903 (2020) [10.1063/5.0020780]

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Please use a persistent id in citations: http://hdl.handle.net/2128/25681 doi:10.1063/5.0020780

Abstract: We have investigated the field direction dependence of thermo-magnetic behavior in single crystalline Mn5Ge3. The adiabatic temperature change ΔTad in pulsed fields, the isothermal entropy change ΔSiso calculated from static magnetization measurements, and heat capacity have been determined for fields parallel and perpendicular to the easy magnetic direction [001]. The isothermal magnetization measurements yield, furthermore, the uniaxial anisotropy constants in second and fourth order, K1 and K2. We discuss how the anisotropy affects the magneto-caloric effect (MCE) and compare the results to the related compound MnFe4Si3, which features an enhanced MCE, too, but instead exhibits strong easy plane anisotropy. Our study reveals the importance of magnetic anisotropy and opens new approaches for optimizing the performance of magnetocaloric materials in applications.

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