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V. Paul-Boncour, C. Giorgetti, G. Wiesinger, A. Percheron-Guégan:
"Influence of deuterium absorption on structural and magnetic properties of ErFe₂";
Journal of Alloys and Compounds, 356-357 (2003), S. 195 - 199.

Influence of deuterium absorption on structural and magnetic properties of ErFe2

V. Paul-Boncour [Corresponding Author Contact Information] , [E-mail The Corresponding Author] , a, C. Giorgettib, G. Wiesingerc and A. Percheron-Guégana

a LCMTR, CNRS, 2?8 rue H. Dunant, 94320, Thiais, France
b LURE, Bat. 209D, BP34, 91898, Orsay-Cedex, France
c Institute for Solid State Physics, TU Wien, Wiedner Hauptstrasse 8, A-1040, Vienna, Austria

Received 27 August 2002; accepted 25 October 2002. ; Available online 4 March 2003.


Abstract

The structural and magnetic properties of ErFe2Dx deuterides (1.3 [less-than or equal to] x [less-than or equal to] 3.5) were investigated by X-ray diffraction, magnetization measurements, Mössbauer spectroscopy and X-ray magnetic circular dichroism (XMCD). While structural studies revealed the maintenance of the C-15 structure for x<3, 57 Fe Mössbauer spectroscopy indicates the formation of several different local environments of the Fe-sites upon deuterium absorption. Further deuterium absorption (3.4 [less-than or equal to] x [less-than or equal to] 3.6) led to a rhombohedral distortion and to a decrease of the local Fe and Er moments. The XMCD spectra of ErFe2D3.4 at the Fe-K edge display a complex behaviour versus temperature, which is attributed to the great influence of the Er neighbours below the compensation temperature. In addition the XMCD signal collapses at both the Er-LIII edge and Fe-K edge when crossing the compensation point.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04405730

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