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arXiv · 1802.07511

Spin-fluctuations drive the inverse magnetocaloric effect in Mn5Si3

N. Biniskos·K. Schmalzl·S. Raymond·S. Petit·P. Steffens·J. Persson·T. Brueckel
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Abstract

Inelastic neutron scattering measurements were performed on single crystals of the antiferromagnetic compound Mn5Si3 in order to investigate the relation between the spin dynamics and the magneto-thermodynamic properties. It is shown that among the two stable antiferromagnetic phases of this compound, the high temperature one has an unusual magnetic excitation spectrum where propagative spin-waves and diffuse spin-fluctuations coexist. Moreover, it is evidenced that the inverse magnetocaloric effect of Mn5Si3, the cooling by adiabatic magnetization, is associated with field induced spin-fluctuations.

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N. Biniskos, K. Schmalzl, S. Raymond, S. Petit, P. Steffens, J. Persson, T. Brueckel. 2018-02-21. Spin-fluctuations drive the inverse magnetocaloric effect in Mn5Si3. https://doi.org/10.1103/physrevlett.120.257205

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