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Amorphous 5f Ferromagnetic Hydrides UH_{3}Mo_{x}

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Tkach I., Kim-Ngan N., Maškova S., Andreev A., Matěj Z., Havela L.

γ-U metal, stabilized down to room temperature in the bcc structure by Mo doping, can absorb hydrogen at high H_{2} pressures only. The product is amorphous hydride UH_{3}Mo_{x} analogous to β-UH_{3}. Such hydrides are ferromagnetic with high Curie temperatures (up to 200 K), enhanced with respect to β-UH_{3}. Magnetic moment of U also increases. Large disorder together with high anisotropy lead to a very high coercivity, reaching 4 T at low temperatures. As amorphization normally tends to suppress magnetic ordering of U compounds, such hydrides represent a new class of materials, amorphous U-based ferromagnets with relatively high Curie temperature.

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1 Acta Physica Polonica A

1 2014

1 Andreev A.

1 Havela L.

1 Kim-Ngan N.

1 Matěj Z.

1 Maškova S.

1 Tkach I.

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Amorphous 5f Ferromagnetic Hydrides UH_{3}Mo_{x}