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

Journal of Science: Advanced Materials and Devices

N.H. van Dijk¹  P.C.M. Gubbens¹  E. Brück¹  X.F. Miao¹  A. Amato²  H. Luetkens²  L. Caron³  P. Dalmas de Réotier⁴  A. Yaouanc⁴ 

[1] Fundamental Aspects of Materials and Energy, Faculty of Applied Science, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands;Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, 5232 Villigen-PSI, Switzerland;Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, D-01187 Dresden, Germany;Université Grenoble Alpes, INAC-PHELIQS, F-38000 Grenoble, France;

关键词: Magnetocaloric effect;    Spin correlations;    Muon-spin relaxation;    Spin dynamics;   

DOI  :  10.1016/j.jsamd.2016.06.002

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown