Sr 2 Cr Os O 6 : End point of a spin-polarized metal-insulator transition by 5</…
2007; American Physical Society; Volume: 75; Issue: 2 Linguagem: Inglês
10.1103/physrevb.75.020404
ISSN1550-235X
AutoresYoshiharu Krockenberger, Kailash M. Mogare, M. Reehuis, M. Tovar, Martin Jansen, G. Vaitheeswaran, V. Kanchana, Fredrik Bultmark, Anna Delin, F. Wilhelm, А. Рогалев, A. Winkler, Lambert Alff,
Tópico(s)Multiferroics and related materials
ResumoIn the search for new spintronic materials with high spin polarization at room temperature, we have synthesized an osmium-based double perovskite with a Curie temperature of $725\phantom{\rule{0.3em}{0ex}}\mathrm{K}$. Our combined experimental results confirm the existence of a sizable induced magnetic moment at the Os site, supported by band-structure calculations, in agreement with a proposed kinetic-energy-driven mechanism of ferrimagnetism in these compounds. The intriguing property of ${\mathrm{Sr}}_{2}\mathrm{Cr}\mathrm{Os}{\mathrm{O}}_{6}$ is that it is at the end point of a metal-insulator transition due to $5d$ band filling and at the same time ferrimagnetism and high-spin polarization are preserved.
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