Parasitic ferromagnetism in a hexaboride?

K. Matsubayashi (), M. Maki, T. Tsuzuki, T. Nishioka and N. K. Sato
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K. Matsubayashi: Graduate School of Science, Nagoya University
M. Maki: Graduate School of Science, Nagoya University
T. Tsuzuki: Graduate School of Science, Nagoya University
T. Nishioka: Graduate School of Science, Nagoya University
N. K. Sato: Graduate School of Science, Nagoya University

Nature, 2002, vol. 420, issue 6912, 143-144

Abstract: Abstract Surprisingly for a compound with no magnetic element, Young et al.1 have observed ferromagnetism in calcium hexaboride (CaB6) doped with lanthanum (La) — the system has a ferromagnetic Curie temperature as high as 600 K, which is comparable to that of transition-metal ferromagnets such as iron (Fe). Here we show that high-temperature ferromagnetism in this CaB6 system is not intrinsic but that it is instead due to alien phases of iron and boride.

Date: 2002
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DOI: 10.1038/420143b

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