Pressure variations of the 5f magnetism in UH3

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10402231" target="_blank" >RIV/00216208:11320/20:10402231 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27740/20:10244877
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=i5vPV1ZHnH" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=i5vPV1ZHnH</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jmmm.2019.165993" target="_blank" >10.1016/j.jmmm.2019.165993</a>

Result language
angličtina
Original language name
Pressure variations of the 5f magnetism in UH3
Original language description
Pressure variations of the Curie temperature of the 5f ferromagnet beta-UH3 were studied using the Mo-alloyed hydride (UH3)(0.)Mo-82(0).18, which is stable in air and has very similar T-C and magnetization per U atom. By means of ac magnetic susceptibility a linear decrease of T-C was observed for pressures up to 3.2 GPa. The coefficient dT(C)/dp = -2.05 K/GPa gives dlnT(C)/dp = 1/T*dT(C)/dp approximate to -0.011 GPa(-1). This value is smaller than expected for a 5f-band ferromagnet with relatively short U-U distances and suggests that UH3 may be more localized than expected. Among AnX compounds, similar dependence was found e.g. for US. Revisiting existing data on lattice elasticity for beta-UH3, bulk modulus B approximate to 100 GPa can be assumed, leading to dlnT(C)/dlnV = 1.1. Experimental data are confronted with results of GGA + U electronic structure calculations. Plausible values of direct Coulomb U and Hund's exchange J are deduced. The lattice compression was found to reduce predominantly the orbital moments.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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