Structure and magnetic properties of hydrides based on uranium bcc alloys

0439739 - FZÚ 2015 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Havela, L. - Paukov, M. - Tkach, I. - Matěj, Z. - Kim-Ngan, N.-T.H. - Andreev, Alexander V.
Structure and magnetic properties of hydrides based on uranium bcc alloys.
MRS Proceedings volume 1683 - Symposium S - Actinides - Basic Science, Applications and Technology. Cambridge: Materials Research Society, 2014 - (Riseborough, P.; Soderlind, P.; Havela, L.; Lukens, W.; Migliori, A.). ISBN 978-1-60511-664-8.
[Materials Research Society Spring Meeting 2014. San Francisco (US), 21.04.2014-25.04.2014]
Institucionální podpora: RVO:68378271
Klíčová slova: uranium * hydrides * amorphous state * ferromagnetism
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

Gamma γ-U alloys with Mo or Zr are more resistant to hydrogen than U metal. High pressures of H are needed to produce hydrides. Amorphous structure of UH3Mox can be represented as the cubic structure of β-UH3 type with grain size around 1 nm. UH3Zrx are formed in the cubic α-UH3 type of structure. All the hydrides are ferromagnets, with magnetic parameters (magnetic moments, Curie temperature) exceeding those of β-UH3 (0.9 μB/U, 165-170 K). It is deduced that α-UH3 has magnetic properties very similar to β-UH3, despite rather different U-U spacing.
Trvalý link: http://hdl.handle.net/11104/0242959