Number of the records: 1

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

SYSNO ASEP	0469816
Document Type	A - Abstract
R&D Document Type	O - Ostatní
Title	CaF2-based UO2/Fe3O4 thin films: crystal structure and magnetic exchange bias effect
Author(s)	Tereshina, Evgeniya (FZU-D)_RID Bao, Z. (NL) Havela, L. (CZ) Macková, Anna (UJF-V)_{RID, ORCID, SAI} Gouder, T. (DE) Caciuffo, R. (DE)
Source Title	2015 IEEE International Magnetics Conference (INTERMAG). - Piscataway : IEEE Inc., 2015 - ISBN 978-1-4799-7321-7 AG-10
Number of pages	1 s.
Action	IEEE International Magnetics Conference (Intermag) 2015
Event date	11.05.2015 - 15.05.2015
VEvent location	Peking
Country	CN - China
Event type	WRD
Language	eng - English
Country	US - United States
Keywords	exchange bias ; magnetite ; uranium dioxide
Subject RIV	BM - Solid Matter Physics ; Magnetism
Subject RIV - cooperation	Nuclear Physics Institute - Nuclear, Atomic and Molecular Physics, Colliders
R&D Projects	GP13-25866P GA ČR - Czech Science Foundation (CSF)
Institutional support	FZU-D - RVO:68378271 ; UJF-V - RVO:61389005
UT WOS	000381606000053
EID SCOPUS	84942456032
DOI	10.1109/INTMAG.2015.7156543
Annotation	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.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2017

Number of the records: 1