ACTA

Crystal Structure and Magnetic Properties of Pyrrhotite-Type Compounds Fe_7-yV_yS₈

N.V. Selezneva^a, P.N.G. Ibrahim^a, N.M. Toporova^a, E.M. Sherokalova^a and N.V. Baranov^a,b
^aInstitute of Natural Sciences and Mathematics, Ural Federal University, 620083, Ekaterinburg, Russia
^b M.N. Miheev Institute of Metal Physics, Ural Branch of RAS, 620990, Ekaterinburg, Russia

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The pyrrhotite-type compounds Fe_7-yV_yS₈ have been synthesized and studied by means of the X-ray diffraction and magnetization measurements in order to reveal how the substitution of V for Fe affects the crystal structure, phase transition and magnetic properties. The growth of the V content in Fe_7-yV_yS₈ results in changes of the crystal structure and leads to a sharp decrease in the resultant magnetization, non-monotonous change of the coercive field and reduction of the magnetic ordering temperature. Unlike ferrimagnetic ordering in pyrrhotite Fe₇S₈ the compound V₇S₈ is observed to exhibit a Pauli-paramagnetic behaviour.

DOI: 10.12693/APhysPolA.133.450
PACS numbers: 61.66.Fn, 75.30.Kz, 75.50.Gg