Electron doping in the double perovskite LaxA 2-xCrWO6 with A=Sr and Ca

S. Geprägs, P. Majewski, R. Gross, C. Ritter, L. Alff

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Abstract

The ferrimagnetic double perovskites can have high Curie temperatures TC above 600 K. In the system Sr2 FeMoO6 (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 Lax Ca2-x CrWO6. This demonstrates that electron doping generically increases TC in the ferrimagnetic double perovskites. However, in the system Sr2 CrWO6 (TC ≈450 K) the preferential formation of LaCrO3 prevents electron doping by La substitution as supported by neutron scattering and x-ray diffraction.

Original languageEnglish
Article number08J102
JournalJournal of Applied Physics
Volume99
Issue number8
DOIs
StatePublished - 2006
Externally publishedYes

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