The structure and magnetic properties in Dy3+ doped SmCrO3 ceramics |
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| Affiliation: | 1. Institute of Materials Physics, Hangzhou Dianzi University, Hangzhou 310018, PR China;2. College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000, PR China;1. Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India;2. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;1. Departamento de Física, Universidade Federal de Sergipe, 49100-000 São Cristóvão, SE, Brazil;2. Cavendish Laboratory, Department of Physics, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom;3. Laboratorio de Cerámicos y Nanomateriales, Facultad de Ciencias Física, Universidad Nacional Mayor de San Marcos, Ap. Postal 14-0149, Lima, Peru;1. GREMAN CNRS UMR 7347, Université F. Rabelais, IUT de Blois, 15 rue de la Chocolatrie 41029 Blois cedex, France;2. Laboratorio Nacional de Investigacion y Servicios en Espectroscopia Optica-Centro CEQUINOR, Universidad Nacional de La Plata, C. C. 962, 1900 La Plata, Argentina;1. Department of Physics, University of Connecticut, Storrs, CT 06269, USA;2. Department of Chemistry, University of Connecticut, Storrs, CT 06269, USA;3. Institute of Materials Science, University of Connecticut, Storrs, CT 06269, USA;1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;2. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China;3. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China;4. Guangxi Key Laboratory of Superhard Materials, Guilin 541004, China |
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| Abstract: | The Dy3+ doped SmCrO3 polycrystalline ceramics are prepared by solid state method. The structure and magnetic properties are investigated. All samples show orthorhombic structure with space group Pnma. Three magnetic transitions are detected in Dy3+ doped SmCrO3 samples, which arise from the Cr3+-Cr3+ interactions and the spin reorientation of Cr3+, respectively. Both field cooled (FC) and zero field cooled (ZFC) exchange bias (EB) effects are observed in the prepared Sm1-xDyxCrO3 (x = 0 − 0.5) samples below the spin reorientation temperature (TSR), and the EB field (HEB) increases dramatically below TSR. With the increase of the doping level, the HEB is depressed. Three anomalous variations of magnetic entropy change (ΔSM) derived from the isothermal magnetization are observed, which are consistent with the magnetic transitions. Compared with the ΔSM after ZFC processes, the anomalous variations of ΔSM at ~25 K almost disappear after FC processes due to the enhanced unidirectional anisotropy, and no obvious influence is observed for the other two anomalous variations after FC processes. |
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| Keywords: | Multiferroic Exchange bias Magnetocaloric |
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