EFFECTS OF VANADIUM IMPURITIES ON THE SPIN-ROTATION TRANSITION OF IRON SELENIDE 4C FE7SE8

Authors
OK HN BAEK KS PARK EB
Citation
Hn. Ok et al., EFFECTS OF VANADIUM IMPURITIES ON THE SPIN-ROTATION TRANSITION OF IRON SELENIDE 4C FE7SE8, Solid state communications, 92(5), 1994, pp. 459-461
Citations number
10
Categorie Soggetti
Physics, Condensed Matter
Journal title
Solid state communications → ACNP
ISSN journal
00381098
Volume
92
Issue
5
Year of publication
1994
Pages
459 - 461
Database
ISI
SICI code
0038-1098(1994)92:5<459:EOVIOT>2.0.ZU;2-E
Abstract
(Fe0.92V0.08)(7)Se-8 has been studied by Massbauer spectroscopy and X- ray diffraction. The crystal structure is found to be a triclinic supe rstructure of the NiAs structure. Abrupt change of quadrupole shifts a t 123 K suggests that the spin-rotation transition proceeds abruptly i n contrast with the gradual transition reported for Fe7Se8 with the sa me triclinic superstructure. The iron ions at all four sites are found to be in a highly covalent ferrous state. Neel and Debye temperatures are found to be 420 +/- 2 K and 232 +/- 5 K, respectively.