Hydrogen in U-T alloys: Crystal structure and magnetism of UH3-V

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10427993" target="_blank" >RIV/00216208:11320/21:10427993 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=L3Xs9KnxNR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=L3Xs9KnxNR</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2020.157406" target="_blank" >10.1016/j.jallcom.2020.157406</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrogen in U-T alloys: Crystal structure and magnetism of UH3-V

Popis výsledku v původním jazyce

U-V alloys with variable phase composition were prepared using ultrafast cooling. 15 at.% V is not sufficient to suppress entirely the orthorhombic alpha-U type of phase and higher alloying concentrations lead to a segregation of pure vanadium. The alloys are stable with respect to H-2 exposure at pressures of 10(5) Pa. Nevertheless hydrogenation proceeds slowly at high H-2 pressures. Resulting hydrides exhibit a common beta-UH3 structure. This is unusual among the U-T systems, which yield either alpha-UH3 or nano-crystalline beta-UH3 structures. The UH3-V system is ferromagnetic with the Curie temperatures monotonously increasing with the V concentration to T-C = 190 K for 15 at.% V. Magnetic moments remain on the level of 1.0 mB/U. The results prove that the increase of T-C in alloyed U hydrides of the UH3-T type does not depend on particular structure details or type of the T element, although the latter modifies somewhat the maximum T-C values achieved. The situation can be understood assuming that the substitution of U by T provides an enhanced H/U ratio, while the U-H interaction is a prominent element of the 5f moments formation and ordering. (C) 2020 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Hydrogen in U-T alloys: Crystal structure and magnetism of UH3-V

Popis výsledku anglicky

U-V alloys with variable phase composition were prepared using ultrafast cooling. 15 at.% V is not sufficient to suppress entirely the orthorhombic alpha-U type of phase and higher alloying concentrations lead to a segregation of pure vanadium. The alloys are stable with respect to H-2 exposure at pressures of 10(5) Pa. Nevertheless hydrogenation proceeds slowly at high H-2 pressures. Resulting hydrides exhibit a common beta-UH3 structure. This is unusual among the U-T systems, which yield either alpha-UH3 or nano-crystalline beta-UH3 structures. The UH3-V system is ferromagnetic with the Curie temperatures monotonously increasing with the V concentration to T-C = 190 K for 15 at.% V. Magnetic moments remain on the level of 1.0 mB/U. The results prove that the increase of T-C in alloyed U hydrides of the UH3-T type does not depend on particular structure details or type of the T element, although the latter modifies somewhat the maximum T-C values achieved. The situation can be understood assuming that the substitution of U by T provides an enhanced H/U ratio, while the U-H interaction is a prominent element of the 5f moments formation and ordering. (C) 2020 Elsevier B.V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

856

Číslo periodika v rámci svazku

březen

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

157406

Kód UT WoS článku

000627309500036

EID výsledku v databázi Scopus

2-s2.0-85092661522