Synthesis and Charaterisation of Chromium Oxyselenide (Cr2Se0.7O2.3) Formed from Chemical Vapour Synthesis: A New Antiferromagnet

✍ Scribed by Nicolas D. Boscher; Claire J. Carmalt; A. Garcia Prieto; Quentin A. Pankhurst; Robert G. Palgrave; Ivan P. Parkin

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 134 KB
• Volume: 2007
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200700789

✦ Synopsis

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)