Amorphous 5f ferromagnetic hydrides UH.sub.3./sub.Mo.sub.x./sub

0433133 - FZÚ 2015 RIV PL eng C - Konferenční příspěvek (zahraniční konf.)
Tkach, I. - Kim-Ngan, N.-T.H. - Mašková, S. - Andreev, Alexander V. - Matěj, Z. - Havela, L.
Amorphous 5f ferromagnetic hydrides UH₃Mo_x
Acta Physica Polonica A. Vol. 126 č1. Warsaw: Polish Academy of Sciences, 2014, s. 292-293. ISSN 0587-4246. E-ISSN 1898-794X.
[Czech and Slovak Conference on Magnetism /15./. Košice (CZ), 17.06.2013-21.06.2013]
Institucionální podpora: RVO:68378271
Klíčová slova: uranium * hydrides * amorphous state * ferromagnetism
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Gamma-U metal, stabilized down to room temperature in the bcc structure by Mo doping, can absorb hydrogen at high pressures only. The product is amorphous hydride UH3Mox analogous to beta-UH3. Such hydrides are ferromagnetic with high Curie temperatures (up to 200 K), enhanced with respect to beta-UH3. 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.
Trvalý link: http://hdl.handle.net/11104/0237398