CaF2-based UO2/Fe3O4 thin films: crystal structure and magnetic exchange bias effect

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F15%3A00469816" target="_blank" >RIV/68378271:_____/15:00469816 - isvavai.cz</a>
Alternative codes found
RIV/61389005:_____/15:00469816 RIV/00216208:11320/15:10363139
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
CaF2-based UO2/Fe3O4 thin films: crystal structure and magnetic exchange bias effect
Original language description
We studied the crystal structure and magnetic exchange bias (EB) effect in bilayers of an antiferromagnetic UO2 with a ferrimagnetic Fe3O4. The samples were grown on CaF2 (100) and (111) substrates. Magnetic hysteresis loops obtained after field cooling in a magnetic field of 20 kOe showed strong exchange bias with the maximum effect reaching 1.6 kOe at 5 K for the UO2/Fe3O4 sample with the thinnest magnetite layer of tFM = 80 Å (CaF2 (100) substrate). The EB obtained for the same sample on a CaF2 [111] was found to be of 25% higher. Similar trend was found in the samples with larger tFM’s. Interestingly, exchange bias did not vanish at the bulk Néel temperature of UO2. Non-zero values of EB were observed up to 125 K. This is in line with our previous study of the LaAlO3-based UO2/Fe3O4 system, where exchange bias disappeared at the Verwey transition temperature in magnetite.n
Czech name
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Czech description
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Project
<a href="/en/project/GP13-25866P" target="_blank" >GP13-25866P: Uranium-based multilayers: structure, magnetism and related electronic properties</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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