Temperature-Dependent Dielectric and Magnetic Properties of Scandium-Substituted HoFeO 3 Nanoparticles
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ORIGINAL PAPER
Temperature-Dependent Dielectric and Magnetic Properties of Scandium-Substituted HoFeO3 Nanoparticles V. Jagadeesha Angadi 1 & K. Manjunatha 2 & Mustafa Akyol 3 & Ahmet Ekicibil 4 & Shidaling Matteppanavar 5 & A. V. Pavlenko 6,7 & S. P. Kubrin 6 Received: 7 May 2020 / Accepted: 6 July 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In the present work, the HoFeO3 and HoFe0.8Sc0.2O3 nanoparticles prepared by the solution combustion method have been studied to understand their structural, dielectric, and magnetic properties. The refined X-ray diffraction pattern (XRD) confirms the single-phase formation with orthorhombic structure having space group Pbnm (D2h16). The average crystallite size observed in nanometer for both samples and field emission-scanning electron microscopy (FE-SEM) confirms that the grain sizes were about in the region of micrometer. The temperature-dependent dielectric parameters were obtained such as the real part of the dielectric constant, dielectric loss tangent, and AC conductivity studied with frequency. The real part of the dielectric constant is high at lower frequencies and it is constant at higher frequency region. This sort of dielectric behavior can additionally be clarified based on various polarization mechanisms happening in various frequency ranges. The dielectric loss tangent increases with temperature. For both samples, the AC conductivity increases with temperature and frequency. The magnetic transitions and magnetic parameters were studied through the temperature-dependent susceptibility and field-dependent magnetization. For HoFeO3 and HoFe0.8Sc0.2O3, the Neel temperature transition at 5 and 8 K was observed which is characterized to the antiferromagnetic nature. The M-H loop confirms the antiferromagnetic nature at 5 K for HoFeO3 and the ferromagnetic nature at 5 K for HoFe0.8Sc0.2O3. Overall, it confirms the changes of nature from antiferromagnetic nature to ferromagnetic nature after substitution of Sc3+ on HoFeO3. Keywords Solution combustion method . Field emission-scanning electron microscopy . AC conductivity . Antiferromagnetism
1 Introduction * V. Jagadeesha Angadi [email protected] 1
Department of Physics, P.C. Jabin Science College, Hubballi 580031, India
2
Department of Physics, School of Engineering, Presidency University, Bangalore 560064, India
3
Department of Materials Engineering, Adana Alparslan Türkeş Science and Technology University, 01250 Adana, Turkey
4
Department of Physics, Çukurova University, 01330 Adana, Turkey
5
Department of Physics, Basavaprabhu Kore Arts, Science and Commerce College, Chikodi 591201, India
6
Southern Scientific Center of the Russian Academy of Sciences, 41 Chehova, Rostov-on-Don, Russian Federation 344006
7
Research Institute of Physics, Southern Federal University, 194 Stachki, Rostov-on-Don, Russian Federation 344090
In recent years, the orthoferrite oxide (RFeO3) nanoparticles have pulled in significant enthusiasm because of their good electrical and ma
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