UNSPECIFIED (1996) A magnetic x-ray diffraction investigation of gadolinium selenide. JOURNAL OF PHYSICS-CONDENSED MATTER, 8 (14). pp. 2425-2435. ISSN 0953-8984

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Abstract

A single-crystal synchrotron radiation study of gadolinium selenide has been made in the temperature range 15-100 K. GdSe has the rocksalt structure and becomes antiferromagnetic below a reported Neel temperature of 65 K. At 15 K, magnetic reflections are observed at G + tau with modulation wavevector tau = {1/2, 1/2, 1/2} propagating from reciprocal lattice point G. This is achieved by exploiting the resonant enhancement in the vicinity of the Gd LII and LIII edges. Similar enhancements are observed at the two edges, with the maximum effect occurring approximately 3 eV above the absorption edge. The temperature dependence of the intensity of the magnetic reflections indicates a Neel temperature of 63(1) K. These measurements, together with high-resolution studies of the fundamental reflections (tau = 0), contribute further evidence of magnetic or structural changes in the sample at 37(1) K. Our observations are discussed and compared with previous x-ray diffraction and magnetic susceptibility measurements.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF PHYSICS-CONDENSED MATTER
Publisher:	IOP PUBLISHING LTD
ISSN:	0953-8984
Date:	1 April 1996
Volume:	8
Number:	14
Number of Pages:	11
Page Range:	pp. 2425-2435
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/18917

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