journal article·2020-04-01Open access

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

AIP Advances· Volume 10· Issue 4

Abstract

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.
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Research context

OpenAlex topics: Multiferroics and related materials · Magnetic properties of thin films · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

B. Verkin Institute for Low Temperature Physics and Engineering of NASU 1 , Nauky 47, Kharkov 61103, Ukraine

Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 2 , Essen 45141, Germany

Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen 3 , Duisburg 47057, Germany

V. N. Karazin Kharkiv National University 4 , 4 Svobody Sq., Kharkiv 61000, Ukraine

Department of Electrochemical Materials Science, Center for Physical Sciences and Technology 5 , Sauletekio Av. 3, Vilnius LT-10257, Lithuania

Energy Safety Research Institute (ESRI), College of Engineering, Swansea University 6 , Bay Campus, Fabian Way, Swansea SA1 8EN, United Kingdom

Scientific-Practical Materials Research Centre of NASB 7 , P. Brovka 19, Minsk 220072, Belarus

ISIS Facility, Rutherford Appleton Laboratory 8 , Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom

Department of Materials and Ceramics Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro 9 , Aveiro 3810-193, Portugal

Funding

Portuguese Foundation for Science and Technology/MCTES · Deutsche Forschungsgemeinschaft · Horizon 2020 Framework Program

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