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

• The crystal and magnetic structure of the magnetocaloric compound FeMnP0.5Si0.5 has 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 a-axis. 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 µB/f.u. It is shown that the magnetic moment in the 3f site is larger (2.5 µB) than in the 3g site (1.9 µB).

Ämnesord

NATURVETENSKAP  -- Kemi -- Oorganisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)

Nyckelord

Magnetocaloric

Neutron powder diffraction

X-ray diffraction (XRD)

Drop synthesis method

Magnetic refrigeration

Magnetic structure

TECHNOLOGY

TEKNIKVETENSKAP

Inorganic chemistry

Oorganisk kemi

Kemi med inriktning mot oorganisk kemi

Chemistry with specialization in Inorganic Chemistry

Teknisk fysik med inriktning mot fasta tillståndets fysik

Engineering Science with specialization in Solid State Physics

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