# Spin-fluctuations drive the inverse magnetocaloric effect in Mn5Si3

## TL;DR

This study reveals that in Mn5Si3, the inverse magnetocaloric effect is driven by field-induced spin-fluctuations, linked to unique spin dynamics observed through neutron scattering.

## Contribution

It demonstrates the connection between spin-fluctuations and the inverse magnetocaloric effect in Mn5Si3, highlighting the role of spin dynamics in magneto-thermodynamic properties.

## Key findings

- High-temperature phase exhibits coexistence of spin-waves and diffuse spin-fluctuations.
- Inverse magnetocaloric effect is associated with field-induced spin-fluctuations.
- Spin dynamics are crucial for understanding magnetocaloric phenomena in Mn5Si3.

## 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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Source: https://tomesphere.com/paper/1802.07511