Properties and Collapse of the Ferromagnetism in UCo1-xRuxAl Studied in Single Crystals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10322748" target="_blank" >RIV/00216208:11320/16:10322748 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.7566/JPSJ.85.034710" target="_blank" >http://dx.doi.org/10.7566/JPSJ.85.034710</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.7566/JPSJ.85.034710" target="_blank" >10.7566/JPSJ.85.034710</a>
Alternative languages
Result language
angličtina
Original language name
Properties and Collapse of the Ferromagnetism in UCo1-xRuxAl Studied in Single Crystals
Original language description
We have investigated the ferromagnetic (FM) phase which suddenly develops in UCo1-xRuxAl and is isolated by paramagnetic regions on both sides from the parent UCoAl and URuAl. For that purpose we have grown high quality single crystals with x = 0.62, 0.70, 0.74, 0.75, and 0.78. The properties of the FM phase have been investigated by microscopic and macroscopic methods. Polarized neutron diffraction on a single crystal with x = 0.62 revealed the gradual growth of the hybridization between U and T-site in the U-T plane with increasing x. Hybridization works here as a mediator of the strong indirect interaction, while the delocalized character of the 5 f states is still conserved. As a result very weak spontaneous magnetic moments are observed for all alloys with magnitude nearly in proportion to the TC for x < 0.62, while an enormous disproportion exists between them near x(crit). The magnetization, specific heat, electrical resistivity, and Hall effect measurements confirmed that the FM transition is suppressed continuously at the critical concentration x(crit) approximate to 0.77. Two quantum critical points are then expected on both sides of the FM dome. We propose a scenario that the order of the FM/PM transition differs at opposite boundaries of the FM dome. We conclude that both criticalities are influenced by disorder. Criticality on the UCoAl side has the character of a clean FM metal, while on the Ru rich side it has the character of a magnetically inhomogeneous system involving a Griffiths phase.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
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)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of the Physical Society of Japan
ISSN
0031-9015
e-ISSN
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Volume of the periodical
85
Issue of the periodical within the volume
3
Country of publishing house
JP - JAPAN
Number of pages
10
Pages from-to
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UT code for WoS article
000371091100018
EID of the result in the Scopus database
2-s2.0-84968708080