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Electron doping in the double perovskite La[sub x]A[sub 2−x]CrWO[sub 6] with A=Sr and Ca

Geprägs, S. and Majewski, P. and Gross, R. and Ritter, C. and Alff, L. (2006):
Electron doping in the double perovskite La[sub x]A[sub 2−x]CrWO[sub 6] with A=Sr and Ca.
In: Journal of Applied Physics, pp. 7054(1-3), 99, (8), ISSN 00218979, [Online-Edition: http://dx.doi.org/10.1063/1.2167054],
[Article]

Abstract

The ferrimagnetic double perovskites can have high Curie temperatures TC above 600 K. In the system Sr2FeMoO6 (TC ≈ 420 K) electron doping by substituting, for example, La3+ for Sr2+ ions leads to a considerable increase in TC. Here we report the same effect for LaxCa2−xCrWO6. This demonstrates that electron doping generically increases TC in the ferrimagnetic double perovskites. However, in the system Sr2CrWO6 (TC ≈ 450 K) the preferential formation of LaCrO3 prevents electron doping by La substitution as supported by neutron scattering and x-ray diffraction.

Item Type: Article
Erschienen: 2006
Creators: Geprägs, S. and Majewski, P. and Gross, R. and Ritter, C. and Alff, L.
Title: Electron doping in the double perovskite La[sub x]A[sub 2−x]CrWO[sub 6] with A=Sr and Ca
Language: English
Abstract:

The ferrimagnetic double perovskites can have high Curie temperatures TC above 600 K. In the system Sr2FeMoO6 (TC ≈ 420 K) electron doping by substituting, for example, La3+ for Sr2+ ions leads to a considerable increase in TC. Here we report the same effect for LaxCa2−xCrWO6. This demonstrates that electron doping generically increases TC in the ferrimagnetic double perovskites. However, in the system Sr2CrWO6 (TC ≈ 450 K) the preferential formation of LaCrO3 prevents electron doping by La substitution as supported by neutron scattering and x-ray diffraction.

Journal or Publication Title: Journal of Applied Physics
Volume: 99
Number: 8
Uncontrolled Keywords: lanthanum, calcium compounds, chromium compounds, ferrimagnetic materials, doping, Curie temperature, neutron diffraction, X-ray diffraction
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 26 Mar 2012 11:32
Official URL: http://dx.doi.org/10.1063/1.2167054
Identification Number: doi:10.1063/1.2167054
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