Magnetic properties and magnetism simulation of SmFe0.5Cr0.5O3 nanoparticles prepared by sol-gel method

This study reported the synthesis process of SmFe 0.5 Cr 0.5 O 3 by the sol-gel method, and its structure, hyperfine parameters and magnetic properties are also studied. X-ray diffraction (XRD) revealed the Pbnm(62) spatial group characteristics of the nanoscale size and orthogonally distorted perov...

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Bibliographic Details
Published in:Journal of sol-gel science and technology 2022-03, Vol.101 (3), p.588-595
Main Authors: Liu, Lebin, Mo, Jiajun, Han, Xudong, Liu, Weiyi, Xu, Shiyu, Liu, Jingzhi, Liu, Min
Format: Article
Language:English
Subjects:
Ceramics
Chemistry and Materials Science
Composites
electronic
Glass
Heisenberg theory
Inorganic Chemistry
Iron 57
magnetic and ferroelectric applications
Magnetic properties
Magnetism
Magnetization
Magnetization curves
Materials Science
Monte Carlo simulation
Mossbauer spectroscopy
Nanoparticles
Nanotechnology
Natural Materials
Neel temperature
Optical and Electronic Materials
Original Paper: Sol-gel and hybrid materials for dielectric
Perovskite structure
Perovskites
Phase transitions
Quadrilaterals
Sol-gel processes
Spin glasses
Statistical models
Three dimensional models
Transition temperature
X-ray diffraction
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Summary:This study reported the synthesis process of SmFe 0.5 Cr 0.5 O 3 by the sol-gel method, and its structure, hyperfine parameters and magnetic properties are also studied. X-ray diffraction (XRD) revealed the Pbnm(62) spatial group characteristics of the nanoscale size and orthogonally distorted perovskite structure of the samples. The Mössbauer spectrum shows the characteristics of trivalent hexacoordinated high spin ( s  = 5/2) of 57 Fe in the sample and the distorted octahedron symmetric structure environment of triangle or quadrilateral. Magnetization data and Mössbauer spectra record magnetic phase transition at about 250 K ( T N  = 250 K). Under the Néel temperature, the system exhibits a frustrated spin glass state. Monte Carlo simulation of magnetization curves based on 3D Heisenberg model modified by Dzyaloshinskii-Moriya (DM) interaction results in the main exchange constants in the sample ( J Fe-Cr /k B  = 16.04 K) and magnetic phase transition temperature (~250 K). To explore the magnetic properties and mechanism of SFCO nanoparticles. On the one hand, the temperature dependence of sample magnetization (FC, ZFC-T, 200Oe) and isothermal magnetization (M-H, 5 K) curves show that SFCO is a frustrated system with T N ~250K (Figure (a), (b), (c), (d) and (e)). On the other hand, the variable temperature Mössbauer spectra (RT, 250 K, 210 K, 170 K, 100 K) strongly demonstrate the antiferromagnetic transition at about 250K(figure (f)). In addition, the three-dimensional Heisenberg model modified by Dzyaloshinskii- Moriya (DM) was used to simulate its magnetic properties by Monte Carlo method, as shown in Figs. (g), (h) and (i), which showed excellent fitting results ( J Fe-Cr / k B  = 16.04 K), and further supported the existence of magnetic phase transition at about 250 K. Highlights Preparation of SmFe 0.5 Cr 0.5 O 3 Perovskite Nanoparticles by Sol-Gel Method. The structure and magnetic properties of the prepared SmFe 0.5 Cr 0.5 O 3 nanoparticles were characterized by XRD, Mössbauer spectrometer, and VSM. Based on the three-dimensional Heisenberg model modified by Dzyaloshinskii–Moriya interaction, the magnetization curve was simulated by Monte Carlo method to obtain the exchange constant and magnetic ordering temperature.
ISSN:0928-0707
1573-4846
DOI:10.1007/s10971-022-05745-9