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Updated: Jul 8, 2025
09:41
Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides
Published on: May 29, 2018
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Tuneable Short-Range Antiferromagnetic Correlation in Fe-Containing Entropy Stabilized Oxides.
Shangxiong Huangfu1, Alexandra C Austin1,2, Zurab Guguchia3
1Laboratory for High Performance Ceramics, Empa, Überlandstrasse 129, Dübendorf CH-8600, Switzerland.
Inorganic Chemistry
|December 15, 2023
Summary
High entropy in complex perovskites influences magnetic properties. Increased iron content correlates with changes in magnetic transitions and moments, suggesting short-range antiferromagnetism.
Area of Science:
- Materials Science
- Solid State Physics
- Magnetism
Background:
- Understanding the impact of elemental distribution on magnetic properties is crucial for designing novel oxide materials.
- Complex perovskites offer a versatile platform for tuning electronic and magnetic behavior through compositional control.
Purpose of the Study:
- To investigate how a high entropy elemental distribution affects magnetic properties in BaBO3 perovskites.
- To correlate changes in magnetic phase transitions and B-site magnetic moments with varying iron content.
Main Methods:
- Synthesis and characterization of a series of BaBO3 perovskites with controlled iron content.
- Superconducting quantum interference device (SQUID) magnetometry to probe magnetic transitions and moments.
- Comprehensive analysis including magnetization, heat capacity, neutron diffraction, and muon-spin rotation (µSR) for the 40% Fe sample.
Main Results:
- A gradual change in the magnetic phase transition and B-site magnetic moment was observed with increasing iron content.
- The 40% iron content sample exhibited evidence of short-range antiferromagnetic correlation at low temperatures.
- Fe ion interactions and d-electron redistribution are suggested as the origin of the observed magnetic behavior.
Conclusions:
- High entropy elemental distribution significantly impacts magnetic properties in complex perovskites.
- Iron content is a key factor in tuning magnetic transitions and moments.
- Short-range antiferromagnetic correlations may arise from Fe-Fe interactions in these high entropy oxides.
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