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Magnetic structure and Mössbauer study of Fe–Cr-based selenide by Ju Hong Kang; Bae Soon Son; Sam Jin Kim; In-Bo Shim; Chul Sung Kim is a Materials Science article available to read on EtoBox.

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Sample of FeCr 2 Se 4 has been studied with X-ray and neutron diffraction, vibrating sample magnetometer (VSM), and Mo ̈ssbauer spectroscopy. The crystal structure of FeCr 2 Se 4 has a monoclinic (space group I2/m) phase, with the lattice constants a 1⁄4 6:26 Å, b 1⁄4 3:61 Å, c 1⁄4 11:82 Å, and b 1⁄4 90:681, respectively. The neutron diffraction patterns were observed from 4 K to room temperature. The magnetic super structure peak disappeared above the Ne ́el temperature. This result is in agreement with the VSM measurements. Temperature dependence of magnetic susceptibility showed an anomalous antiferromagnetic system. The Mo ̈ssbauer spectra were obtained at various temperatures from 4.2 K to room temperature. Mo ̈ssbauer spectrum shows a severe line broadening at 4.2 K, and it gives a direct evidence of a large quadrupole interaction in this material, compared to magnetic dipole interaction. The Mo ̈ssbauer spectrum consists of a doublet at room temperature, denoting a distorted monoclinic symmetry.

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Author

Ju Hong Kang; Bae Soon Son; Sam Jin Kim; In-Bo Shim; Chul Sung Kim

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0304-8853)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)