The crystal and magnetic structure of the magnetocaloric compound FeMnP0.5Si0.5

Details The crystal and magnetic structure of the magnetocaloric compound FeMnP0.5Si0.5 The crystal and magnetic structure of the magnetocaloric compound FeMnP0.5Si0.5

2011-05-10

arxiv.org/abs/1105.1942v1

Physics

Condensed Matter

Materials Science

8 pages, 4 figures

Scientific paper

The crystal and magnetic structure of the magnetocaloric compound FeMnP0.5Si0.5 have been studied by means of neutron and X-ray powder diffraction. Single phase samples of nominal composition FeMnP0.5Si0.5 have been prepared by the drop synthesis method. The compound crystallizes in the Fe2P-type structure (P-62m) with the magnetic moments aligned along the aaxis. It is found that the Fe atoms are mainly situated in the tetrahedral 3g site while the Mn atoms prefer the pyramidal 3f position. The material is ferromagnetic (TC = 382 K) and at 296 K the total magnetic moment is 4.4 \mu B/f.u. It is shown that the magnetic moment in the 3f site is larger (2.5 \mu B) than in the 3g site (1.9 \mu B).

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