Exchange bias in UO2/Fe3O4 thin films above the Néel temperature of UO2./sub

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F14%3A00434826" target="_blank" >RIV/68378271:_____/14:00434826 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/1.4896635" target="_blank" >http://dx.doi.org/10.1063/1.4896635</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4896635" target="_blank" >10.1063/1.4896635</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Exchange bias in UO2/Fe3O4 thin films above the Néel temperature of UO2./sub

Popis výsledku v původním jazyce

Exchange bias (EB) was investigated on heterostructures consisting of a stoichiometric UO2 film grown epitaxially on a LAO substrate and covered with highly textured Fe3O4 layers of variable thickness. EB reaching 2.6 kOe was observed at lowest temperatures in a bilayer with the thinnest Fe3O4. Magnetization measurements demonstrate that a remarkably large EB is present at temperatures higher than the bulk Neel temperature of UO2. The effects is complex: we suggest that it is provided both by strong exchange coupling between UO2 and Fe3O4 and by EB within magnetite. The former can be caused by proximity effects combined with a magnetic anisotropy of UO2, persisting above a continuous magnetic-ordering transformation. For magnetite, the results indicatethe presence of pinned moments up to 120 K, that is a temperature of Verwey transition.

Název v anglickém jazyce

Exchange bias in UO2/Fe3O4 thin films above the Néel temperature of UO2./sub

Popis výsledku anglicky

Exchange bias (EB) was investigated on heterostructures consisting of a stoichiometric UO2 film grown epitaxially on a LAO substrate and covered with highly textured Fe3O4 layers of variable thickness. EB reaching 2.6 kOe was observed at lowest temperatures in a bilayer with the thinnest Fe3O4. Magnetization measurements demonstrate that a remarkably large EB is present at temperatures higher than the bulk Neel temperature of UO2. The effects is complex: we suggest that it is provided both by strong exchange coupling between UO2 and Fe3O4 and by EB within magnetite. The former can be caused by proximity effects combined with a magnetic anisotropy of UO2, persisting above a continuous magnetic-ordering transformation. For magnetite, the results indicatethe presence of pinned moments up to 120 K, that is a temperature of Verwey transition.

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

<a href="/cs/project/GP13-25866P" target="_blank" >GP13-25866P: Multivrstvy na bázi uranu: struktura, magnetizmus a související elektronové vlastnosti</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Applied Physics Letters

ISSN

0003-6951

e-ISSN

—

Svazek periodika

105

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

"122405-1"-"122405-5"

Kód UT WoS článku

000343004400049

EID výsledku v databázi Scopus

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