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Structural and Magnetic Phase Transitions in BiFe1 - xMnxO3 Solid Solution Driven by Temperature.
Dmitry V Karpinsky1,2, Maxim V Silibin2, Siarhei I Latushka1,2
1Scientific-Practical Materials Research Centre of NAS of Belarus, 220072 Minsk, Belarus.
Nanomaterials (Basel, Switzerland)
|May 14, 2022
Summary
Dopant concentration in BiFeO3-BiMnO3 solid solutions drives structural and magnetic transitions. Irreversible phase changes stabilize high-temperature structures, influencing the magnetic state and revealing composition-dependent relationships.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Magnetism
Background:
- Bismuth ferrite (BiFeO3) and bismuth manganite (BiMnO3) are multiferroic materials with unique structural and magnetic properties.
- Solid solutions offer tunable properties by varying composition.
Purpose of the Study:
- To investigate the structural and magnetic phase transitions in (1-x)BiFeO3-(x)BiMnO3 solid solutions.
- To understand the relationship between structural parameters and magnetic state as a function of dopant concentration and thermal history.
Main Methods:
- X-ray diffraction (lab-based and synchrotron) for crystal structure analysis.
- Magnetization measurements, differential thermal analysis (DTA), and differential scanning calorimetry (DSC) for magnetic and thermal properties.
Main Results:
- Dopant concentration induces transitions from rhombohedral to orthorhombic and monoclinic phases, with two-phase regions observed.
- Magnetic structure transitions from antiferromagnetic to non-collinear antiferromagnetic and then to ferromagnetic.
- Compounds with two-phase structures exhibit irreversible temperature-driven transitions, stabilizing high-temperature phases and altering magnetic contributions.
Conclusions:
- The (1-x)BiFeO3-(x)BiMnO3 solid solution exhibits complex structural and magnetic phase behavior driven by composition.
- Irreversible transitions play a crucial role in stabilizing specific phases and influencing the overall magnetic state.
- The interplay between structural parameters, magnetic state, and thermal history is critical for understanding these materials.
Keywords:
X-ray diffractioncrystal structuremagnetic statemagnetometrymultiferroicsphase transitionssynchrotron diffractionMore Related Videos
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