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Synthesis and Charaterisation of Chromium Oxyselenide (Cr 2 Se 0.7 O 2.3 ) Formed from Chemical Vapour Synthesis: A New Antiferromagnet
Author(s) -
Boscher Nicolas D.,
Carmalt Claire J.,
Prieto A. Garcia,
Pankhurst Quentin A.,
Palgrave Robert G.,
Parkin Ivan P.
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700789
Subject(s) - chromium , chemistry , raman spectroscopy , antiferromagnetism , selenide , selenium , x ray photoelectron spectroscopy , oxidation state , inorganic chemistry , analytical chemistry (journal) , metal , chemical engineering , chromatography , physics , organic chemistry , engineering , optics , condensed matter physics
Abstract Chromium oxyselenide Cr 2 Se 0.71 O 2.30 was synthesised by chemical vapor synthesis of chromium oxychloride and diethyl selenide. The material adopts the Cr 2 Se 3 structure type with a = 6.26(3) Å and c = 17.45(3) Å. The Raman spectrum shows bands at 225 and 550 cm –1 . X‐ray photoelectron spectroscopy and wavelength dispersive analysis by X‐rays confirmed the material was homogeneous and of uniform composition Cr 2 Se 0.71 O 2.30 . The material is an antiferromagnet with a Neel temperature of 43 K. This is the first solid‐state chromium oxyselenide reported and shows that the hard oxygen and soft selenium can co‐exist in the same lattice if formed under the kinetic product conditions of a rapid gas‐phase reaction.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)