High/low-moment phase transition in hexagonal Mn-Fe-P-Si compounds

Journal article (2012)

Authors

N.H. Dung

L. Zhang

Z.Q. Ou

L. Zhao

L. Van Eijck

A.M. Mulders

M. Avdeev

E. Suard

N.H. Van Dijk

E. Brück

Faculty

Applied Sciences () (TU Delft)

DOI: https://doi.org/doi:10.1103/PhysRevB.86.045134

Magnetic transition Magnetocaloric material Transition metal

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Published Date

27-07-2012

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Source:

Physical Review B, 86 (4), 2012

Faculty

Applied Sciences

Abstract

Using high-resolution neutron diffraction measurements for Mn-rich hexagonal Mn-Fe-P-Si compounds, we show that the substitution of Mn for Fe on the 3f sites results in a linear decrease of the Fe/Mn(3f) magnetic moments, while the Mn(3g) magnetic moments remain constant. With increasing temperature, the Mn(3g) magnetic moments show almost no change, while the Fe/Mn(3f) moments decrease quickly when the transition temperature is approached. The reduction of the magnetic moments at the transition temperature and in the high-temperature range is discussed based on changes in interatomic distances and lattice parameters and high-temperature magnetic-susceptibility measurement.

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