Variations of magnetic properties of UGa2 under pressure

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68378271:_____/15:00448053

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Variations of magnetic properties of UGa2 under pressure

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Variations of magnetic properties of UGa2 under pressure

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Physical Review B - Condensed Matter and Materials Physics

ISSN

1098-0121

e-ISSN

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Svazek periodika

91

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

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Kód UT WoS článku

000348873200003

EID výsledku v databázi Scopus

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