Exchange bias effect in bulk multiferroic BiFe0.5Sc0.5O3

E. L. Fertman; A. V. Fedorchenko; V. A. Desnenko; V. V. Shvartsman; D. C. Lupascu; S. Salamon; H. Wende; A. I. Vaisburd; A. Stanulis; R. Ramanauskas; N. M. Olekhnovich; A. V. Pushkarev; Yu. V. Radyush; D. D. Khalyavin; A. N. Salak

doi:10.1063/1.5135586

AIP Advances (Apr 2020)

Exchange bias effect in bulk multiferroic BiFe0.5Sc0.5O3

E. L. Fertman,
A. V. Fedorchenko,
V. A. Desnenko,
V. V. Shvartsman,
D. C. Lupascu,
S. Salamon,
H. Wende,
A. I. Vaisburd,
A. Stanulis,
R. Ramanauskas,
N. M. Olekhnovich,
A. V. Pushkarev,
Yu. V. Radyush,
D. D. Khalyavin,
A. N. Salak

Affiliations

E. L. Fertman: B. Verkin Institute for Low Temperature Physics and Engineering of NASU, Nauky 47, Kharkov 61103, Ukraine
A. V. Fedorchenko: B. Verkin Institute for Low Temperature Physics and Engineering of NASU, Nauky 47, Kharkov 61103, Ukraine
V. A. Desnenko: B. Verkin Institute for Low Temperature Physics and Engineering of NASU, Nauky 47, Kharkov 61103, Ukraine
V. V. Shvartsman: Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Essen 45141, Germany
D. C. Lupascu: Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Essen 45141, Germany
S. Salamon: Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Duisburg 47057, Germany
H. Wende: Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Duisburg 47057, Germany
A. I. Vaisburd: V. N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv 61000, Ukraine
A. Stanulis: Department of Electrochemical Materials Science, Center for Physical Sciences and Technology, Sauletekio Av. 3, Vilnius LT-10257, Lithuania
R. Ramanauskas: Department of Electrochemical Materials Science, Center for Physical Sciences and Technology, Sauletekio Av. 3, Vilnius LT-10257, Lithuania
N. M. Olekhnovich: Scientific-Practical Materials Research Centre of NASB, P. Brovka 19, Minsk 220072, Belarus
A. V. Pushkarev: Scientific-Practical Materials Research Centre of NASB, P. Brovka 19, Minsk 220072, Belarus
Yu. V. Radyush: Scientific-Practical Materials Research Centre of NASB, P. Brovka 19, Minsk 220072, Belarus
D. D. Khalyavin: ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom
A. N. Salak: Department of Materials and Ceramics Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro 3810-193, Portugal

DOI: https://doi.org/10.1063/1.5135586
Journal volume & issue: Vol. 10, no. 4
pp. 045102 – 045102-5

Abstract

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Below the Néel temperature, TN ∼ 220 K, at least two nano-scale antiferromagnetic (AFM) phases coexist in the polar polymorph of the BiFe0.5Sc0.5O3 perovskite; one of these phases is a weak ferromagnetic. Non-uniform structure distortions induced by high-pressure synthesis lead to competing AFM orders and a nano-scale spontaneous magnetic phase separated state of the compound. Interface exchange coupling between the AFM domains and the weak ferromagnetic domains causes unidirectional anisotropy of magnetization, resulting in the exchange bias (EB) effect. The EB field, HEB, and the coercive field strongly depend on temperature and the strength of the cooling magnetic field. HEB increases with an increase in the cooling magnetic field and reaches a maximum value of about 1 kOe at 5 K. The exchange field vanishes above TN with the disappearance of long-range magnetic ordering. The effect is promising for applications in electronics as it is large enough and as it is tunable by temperature and the magnetic field applied during cooling.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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