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Magnetism in Re-based ferrimagnetic double perovskites

Winkler, A. and Narayanan, N. and Mikhailova, D. and Bramnik, K. G. and Ehrenberg, H. and Fuess, H. and Vaitheeswaran, G. and Kanchana, V. and Wilhelm, F. and Rogalev, A. and Kolchinskaya, A. and Alff, L. (2009):
Magnetism in Re-based ferrimagnetic double perovskites.
In: New Journal of Physics, pp. 073047, 11, (7), ISSN 1367-2630,
[Online-Edition: http://dx.doi.org/10.1088/1367-2630/11/7/073047],
[Article]

Abstract

We have investigated spin and orbital magnetic moments of the Re 5d ion in the double perovskites A2FeReO6 (A=Ba, Sr, Ca) by x-ray magnetic circular dichroism (XMCD) at the Re L2, 3 edges. In these ferrimagnetic compounds, an unusually large negative spin and positive orbital magnetic moment at the Re atoms was detected. The presence of a finite spin magnetic moment in a 'non-magnetic' double perovskite as observed in the double perovskite Sr2ScReO6 proves that Re has also a small, but finite intrinsic magnetic moment. We further show for the examples of Ba and Ca that the usually neglected alkaline earth ions undoubtedly also contribute to the magnetism in the ferrimagnetic double perovskites.

Item Type: Article
Erschienen: 2009
Creators: Winkler, A. and Narayanan, N. and Mikhailova, D. and Bramnik, K. G. and Ehrenberg, H. and Fuess, H. and Vaitheeswaran, G. and Kanchana, V. and Wilhelm, F. and Rogalev, A. and Kolchinskaya, A. and Alff, L.
Title: Magnetism in Re-based ferrimagnetic double perovskites
Language: English
Abstract:

We have investigated spin and orbital magnetic moments of the Re 5d ion in the double perovskites A2FeReO6 (A=Ba, Sr, Ca) by x-ray magnetic circular dichroism (XMCD) at the Re L2, 3 edges. In these ferrimagnetic compounds, an unusually large negative spin and positive orbital magnetic moment at the Re atoms was detected. The presence of a finite spin magnetic moment in a 'non-magnetic' double perovskite as observed in the double perovskite Sr2ScReO6 proves that Re has also a small, but finite intrinsic magnetic moment. We further show for the examples of Ba and Ca that the usually neglected alkaline earth ions undoubtedly also contribute to the magnetism in the ferrimagnetic double perovskites.

Journal or Publication Title: New Journal of Physics
Volume: 11
Number: 7
Uncontrolled Keywords: Condensed matter: electrical, magnetic and optical
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Structure Research
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 30 Mar 2012 08:36
Official URL: http://dx.doi.org/10.1088/1367-2630/11/7/073047
Identification Number: doi:10.1088/1367-2630/11/7/073047
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