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Temperature-Driven Transformation of the Crystal and Magnetic Structures of BiFe0.7Mn0.3O3 Ceramics

by Siarhei I. Latushka , Dmitry V. Zhaludkevich , Alexei А. Belik , M. I. Sayyed , Nouf Almousa , Dmitry V. Karpinsky , Alex Trukhanov , Maxim V. Silibin , Vadim V. Sikolenko , Sergei Trukhanov , Roman Svetogorov

in Annealing / Antiferromagnetism / Calorimetry / Ceramics / Chemistry / Crystal structure / crystal structure; magnetic properties; phase transitions; synchrotron and neutron diffraction; functional magnetic oxides / Differential scanning calorimetry / Differential thermal analysis / Ferromagnetism / functional magnetic oxides / Magnetic fields / Magnetic measurement / Magnetic moments / Magnetic properties / Neutron diffraction / Phase transitions / QD1-999 / Radiation / Room temperature / Solid solutions / Subsystems / synchrotron and neutron diffraction / Synchrotrons / Temperature / Thermal analysis

2022

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Temperature-Driven Transformation of the Crystal and Magnetic Structures of BiFe0.7Mn0.3O3 Ceramics

2022

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Temperature-Driven Transformation of the Crystal and Magnetic Structures of BiFe0.7Mn0.3O3 Ceramics

2022

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Journal Article

Temperature-Driven Transformation of the Crystal and Magnetic Structures of BiFe0.7Mn0.3O3 Ceramics

Siarhei I. Latushka,

Dmitry V. Zhaludkevich,

Alexei А. Belik,

M. I. Sayyed,

Nouf Almousa,

Dmitry V. Karpinsky,

Alex Trukhanov,

Maxim V. Silibin,

Vadim V. Sikolenko,

Sergei Trukhanov,

Roman Svetogorov

2022

Overview

The compound BiFe0.7Mn0.3O3 consisting at room temperature of coexistent anti-polar orthorhombic and polar rhombohedral phases has a metastable structural state, which has been studied by laboratory X-ray, synchrotron and neutron diffraction, magnetometry, differential thermal analysis, and differential scanning calorimetry. Thermal annealing of the sample at temperatures above the temperature-driven phase transition into the single phase rhombohedral structure (~700 K) causes an increase of the volume fraction of the rhombohedral phase at room temperature from ~10% up to ~30%, which is accompanied by the modification of the magnetic state, leading to strengthening of a ferromagnetic component. A strong external magnetic field (~5 T) applied to the sample notably changes its magnetic properties, as well as provides a reinforcement of the ferromagnetic component, thus leading to an interaction between two magnetic subsystems formed by the antiferromagnetic matrix with non-collinear alignment of magnetic moments and the nanoscale ferromagnetic clusters coexisting within it. The modification of the structural state and magnetic properties of the compounds and a correlation between different structural and magnetic phases are discussed focusing on the effect of thermal annealing and the impact of an external magnetic field.

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Publisher

MDPI AG,MDPI

Subject

/ crystal structure; magnetic properties; phase transitions; synchrotron and neutron diffraction; functional magnetic oxides