Evidence of Spontaneous Co Moment in a Rare-Earth–Cobalt Laves Phase Compound:59Co NMR Study of LaCo2статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 19 июля 2013 г.
Аннотация:The ground-state magnetism of a high-pressure-synthesized cubic Laves phase compound LaCo2 was
investigated by 59Co NMR experiments. At low temperatures, we found two kinds of NMR signals
corresponding to small internal fields, 2:8 and 0.1 T, which are separated due to the anisotropy in the hyperfine field. This result reveals the weak ferromagnetism in LaCo2, indicating that a small spontaneous Co moment can exist in rare-earth–cobalt Laves phase compounds with neither a molecular exchange field from rare-earth atoms nor effects of disorder. The ordered moment and the easy magnetization axis are estimated to be <0.1B/Co and [111], respectively.