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Phase Transitions in Magneto-Electric Hexaferrites
Tatyana Koutzarova1, Svetoslav Kolev1,2, Kiril Krezhov1
1Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria.
ACS Omega
|December 19, 2022
Summary
Chemical doping in Y-type hexaferrites, specifically Ba(Sr)2Me2Fe12O22, influences magnetic phase transitions. Substituting cations affects magnetic properties, enabling stable noncollinear magnetic phases for potential multiferroic applications.
Area of Science:
- Materials Science
- Solid State Physics
- Magnetism
Background:
- Hexaferrites are extensively studied for applications like permanent magnets and microwave devices.
- Recent research focuses on the magneto-electric effect in hexaferrites for multiferroic materials.
- The magneto-electric effect originates from interactions in noncollinear magnetic structures.
Purpose of the Study:
- To explore magnetic phase transitions in Y-type hexaferrites.
- To investigate the impact of cation substitutions on magnetic properties and phase transitions.
- To understand how doping influences the stability of magnetic phases.
Main Methods:
- Summarizing recent advances in Y-type hexaferrite research.
- Analyzing the effects of substituting nonmagnetic Me2+ with magnetic cations.
- Examining the impact of replacing magnetic Fe3+ with nonmagnetic cations.
- Studying structural properties and magnetic phase transitions in Ba(Sr)2Me2Fe12O22.
Main Results:
- Cation substitutions significantly influence magnetic properties and phase transition temperatures.
- Chemical doping can stabilize noncollinear magnetic phases, overcoming metastability issues.
- Specific substitutions in Ba(Sr)2Me2Fe12O22 alter its magnetic behavior.
Conclusions:
- Cation substitution is a viable strategy to tune magnetic phase transitions in Y-type hexaferrites.
- Stable magneto-electric phases can be achieved through controlled doping.
- Further research into doped hexaferrites holds promise for advanced multiferroic applications.
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