Spin correlations in (Mn,Fe)2(P,Si) magnetocaloric compounds above Curie temperature

Journal article (2016)

Authors

X.F. Miao RST/Fundamental Aspects of Materials and Energy - AS
L. Caron Max Planck Institute for Chemical Physics of Solids
P.C.M. Gubbens RST/Fundamental Aspects of Materials and Energy - AS
A Yaouanc Université Grenoble Alpes
P Dalmas de Réotier Université Grenoble Alpes
H. Luetkens Paul Scherrer Institut
A Amato Paul Scherrer Institut
N.H. van Dijk RST/Fundamental Aspects of Materials and Energy - AS
E.H. Brück RST/Fundamental Aspects of Materials and Energy - AS
Research Group
RST/Fundamental Aspects of Materials and Energy (AS) (TU Delft)
Copyright: © 2016 X.F. Miao, L. Caron, P.C.M. Gubbens, A Yaouanc, P Dalmas de Réotier, H. Luetkens, A Amato, N.H. van Dijk, E.H. Brück
DOI
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https://doi.org/10.1016/j.jsamd.2016.06.002
Magnetocaloric effect Muon-spin relaxation Spin correlations Spin dynamics
More Info
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Published Date

21-06-2016

Language

English

Faculty

Applied Sciences

Department

RST/Radiation, Science and Technology

Research Group

RST/Fundamental Aspects of Materials and Energy

Abstract

The longitudinal-field muon-spin relaxation (LF-μSR) technique was employed to study the spin correlations in (Mn,Fe)2(P,Si) compounds above the ferromagnetic transition temperature (TC). The (Mn,Fe)2(P,Si) compound under study is found to show itinerant magnetism. The standard deviation of the magnetic field distribution of electronic origin increases with a decrease in temperature, which is attributed to the development of spin correlations. The anomalously low magnetic fluctuation rate is suggested to be another signature of the spin correlations. The development of pronounced magnetic fluctuations is in agreement with the observed deviation of the paramagnetic susceptibility from Curie–Weiss behavior. Our study sheds light on the magneto-elastic transition and the mixed magnetism in (Mn,Fe)2(P,Si) compounds.