Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 743, Issue -, Pages 274-282Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.01.207
Keywords
Nano-structures; Fe-57 Mossbauer spectrometry; Magnetic properties; Electrical properties
Categories
Funding
- UGC-DAE CSR, Kolkata [UGC-DAE-CSRKC/CRS/13/MS04/Ext/2016, UDCSR/MUM/CD/CRS-M-265/2017/1043]
- Mumbai centre, Govt. of India [UGC-DAE-CSRKC/CRS/13/MS04/Ext/2016, UDCSR/MUM/CD/CRS-M-265/2017/1043]
- UGC, Govt. of India, through the CAS program [F.530/5/CAS/2011(SAP-I)]
- UGC, Govt. of India, through the FIST program [SR/FST/PSI-170/2011(C)]
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Structural, magnetic and dielectric properties of Ca and Co co-doped LaFeO3 [La0.9Ca0.1Fe0.9Co0.1O3, LCFCO] sample are investigated. Nanoparticles of pure LaFeO3 (LFO) are prepared using sol-gel wet chemical method. Here, Ca2+ and Co2+ dopants are chosen to improve the dielectric and magnetic properties of LFO, respectively. The refinement of X-ray diffraction patterns is consistent with the formation of distorted orthorhombic phase of LFO. The analysis of Raman and Mossbauer spectra allow to extract different structural and magnetic information. The observed field dependency of magnetization confirms the introduction of ferromagnetism in the antiferromagnetic structure of LFO due to the doping. Thermal variation of the magnetization suggests a strong domination of ferromagnetic part over antiferromagnetic at low temperatures, which is not found in LFO. The temperature variation of the dielectric constant gives rise the dielectric transition temperature of the doped sample. The dielectric spectroscopy of the samples is found to follow the Cole-Cole relaxation with improved dielectric and magnetodielectric property of the doped sample. (c) 2018 Elsevier B.V. All rights reserved.
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