Variations of magnetic properties of UGa2 under pressure

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10294613" target="_blank" >RIV/00216208:11320/15:10294613 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/15:00448053

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevB.91.064405" target="_blank" >http://dx.doi.org/10.1103/PhysRevB.91.064405</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.91.064405" target="_blank" >10.1103/PhysRevB.91.064405</a>

Result language

angličtina

Original language name

Variations of magnetic properties of UGa2 under pressure

Original language description

Electrical resistivity rho(T) of the 5f-ferromagnet UGa2 was investigated on single-crystalline samples as a function of pressure and magnetic field. Under quasihydrostatic pressure the Curie temperature monotonously increases from T-C = 124 K up to 154K at p = 14.2 GPa after which it turns down steeply and reaches T-C = 147 K at p = 15.2 GPa. At 20 GPa the compound is already nonmagnetic. This dramatic variation is compatible with the exchange interactions mediated by the 5f hybridization with the non-f states. The external pressure first enhances the exchange coupling of the 5f moment but eventually suppresses the magnetic order by washing out the 5f moments. Such a two-band model is adequate for the weakly delocalized 5f states. The external pressure gradually suppresses the spin-disorder resistivity, which reaches very high. values (300 mu Omega cm) above T-C in UGa2. This leads to the crossover from the initial negative to the positive d rho/dT in the paramagnetic state.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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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)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

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

Name of the periodical

Physical Review B - Condensed Matter and Materials Physics

ISSN

1098-0121

e-ISSN

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Volume of the periodical

91

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

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UT code for WoS article

000348873200003

EID of the result in the Scopus database

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