Peculiar properties of UMB4 (M = V, Cr, Mo, W) uranium borides
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10398889" target="_blank" >RIV/00216208:11320/19:10398889 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Z2OjZ83RjR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Z2OjZ83RjR</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1080/17436753.2019.1584480" target="_blank" >10.1080/17436753.2019.1584480</a>
Alternative languages
Result language
angličtina
Original language name
Peculiar properties of UMB4 (M = V, Cr, Mo, W) uranium borides
Original language description
UMB4 (M = V, Cr, Fe, Co, Mo, W, Re, Os) materials prepared by arc-melting have UMB4 as the main phase, with (V, Cr, Fe, Co) crystallising in the YCrB4 structure type, while (Mo, W, Re, Os) adopt the ThMoB4-type. For M = V, Cr, Mo, W the magnetic susceptibility is low and only weakly temperature dependent, but higher than alpha-U, which can be ascribed to a higher density of states at the Fermi level. Heat capacity results point to a very high Debye temperature for both structures, which is associated with very high lattice stiffness of the boron network. However, for W and Mo the boron vibrations are accompanied by low-energy Einstein modes coming from vibrations of the atoms inside the boron cages that could lead to superconductivity. The electronic structure of UMB4 is influenced by a strong 5f-d hybridization and by the B-2p states, which explains the observed weak Pauli paramagnetism.
Czech name
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Czech description
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Classification
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.)
Result continuities
Project
<a href="/en/project/GA18-02344S" target="_blank" >GA18-02344S: Magnetism and electronic structure in Uranium systems with a charge transfer</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advances in Applied Ceramics
ISSN
1743-6753
e-ISSN
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Volume of the periodical
118
Issue of the periodical within the volume
4
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
189-195
UT code for WoS article
000466679800001
EID of the result in the Scopus database
2-s2.0-85064436903