Structural,dielectric, vibrational and magnetic properties of Sm doped BiFeO3 multiferroic ceramics prepared by a rapid liquid phase sintering method |
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| Affiliation: | 1. Department of Physics, Government Post Graduate College, Uttarkashi 249193, India;2. Smart Materials Research Laboratory, Department of Physics, Indian Institute of Technology, Roorkee 247667, India;1. Department of Physics, National Institute of Technology, Durgapur 713209, India;2. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India;3. CSIR-Central Mechanical Engineering Research Institute, Durgapur 713209, India;1. School of Physics, Vigyan Bhawan, Devi Ahilya University, Khandwa Road Campus, Indore 452001, India;2. Laser Material Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013, India;1. Department of Physics and Materials Science and Engineering, Jaypee Institute of Information Technology, Noida 201307, India;2. National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, New Delhi 110012, India;1. Electroceramics Group, Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz, Iran;2. Department of Materials Science and Engineering, Hakim Sabzevari University, Iran;1. Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University, Shanghai 200241, China;2. Laboratory for Microstructures, Shanghai University, 99 Shangda Road, Shanghai 200444, China |
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| Abstract: | ![]()
Rare earth Sm substituted Bi1−xSmxFeO3 with x=0, 0.025, 0.05, 0.075 and 0.10 polycrystalline ceramics were synthesized by a rapid liquid phase sintering method. The effect of varying composition of Sm substitution on the structural, dielectric, vibrational, optical and magnetic properties of doped BiFeO3 (BFO) ceramics have been investigated. X-ray diffraction patterns of the synthesized rare earth substituted multiferroic ceramics showed the pure phase formation with distorted rhombohedral structure with space group R3c. Good agreement between the observed and calculated diffraction patterns of Sm doped BFO ceramics in Rietveld refinement analysis of the X-ray diffraction patterns and Raman spectroscopy also confirmed the distorted rhombohedral perovskite structure with R3c symmetry. Dielectric measurements showed improved dielectric properties and magnetoelectric coupling around Néel temperature in all the doped samples. FTIR analysis establishes O–Fe–O and Fe–O stretching vibrations in BiFeO3 and Sm-doped BiFeO3. Photoluminescence (PL) spectra showed visible range emissions in modified BiFeO3 ceramics. The magnetic hysteresis measurements at room temperature and 5 K showed the increase in the magnetization with the increase in doping concentration of Sm which is due to the structural distortion and partial destruction of spin cycloid caused by Sm doping in BFO ceramics. |
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| Keywords: | C. Dielectric properties C. Magnetic properties Raman spectroscopy Rapid liquid phase sintering |
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