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Updated: Apr 22, 2026
09:06
Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
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Structure and spin dynamics of multiferroic BiFeO3.
Je-Geun Park1, Manh Duc Le, Jaehong Jeong
1Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Korea. Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Summary
Bismuth ferrite (BiFeO3) is a unique room-temperature multiferroic material. This review summarizes its structural, dynamic, and magneto-electric properties, highlighting the interplay of magnetic interactions.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Solid State Chemistry
Background:
- Multiferroic materials exhibit coexisting ferroelectric and magnetic orders, offering potential for novel devices.
- Bismuth ferrite (BiFeO3) is a prominent room-temperature multiferroic with exceptional properties, including high Curie and Néel temperatures and large spontaneous polarization.
- Its unique long-period magnetic cycloid structure arises from competing symmetric exchange and antisymmetric Dzyaloshinskii-Moriya interactions.
Purpose of the Study:
- To provide a comprehensive overview of bulk Bismuth ferrite (BiFeO3).
- To summarize the structural and dynamic properties of both spin and lattice subsystems.
- To elucidate the magneto-electric coupling mechanisms within BiFeO3.
Main Methods:
- Review of existing literature on bulk BiFeO3.
- Analysis of structural and dynamic properties.
- Investigation of spin and lattice dynamics.
- Examination of magneto-electric coupling.
Main Results:
- BiFeO3 possesses high ferroelectric (TC ≈ 1100 K) and antiferromagnetic (TN ≈ 650 K) transition temperatures.
- It exhibits a large spontaneous electric polarization (P ≈ 80 µC cm⁻²).
- A long-period magnetic cycloid (620 Å) is present due to the interplay between symmetric exchange and Dzyaloshinskii-Moriya interactions.
- An intriguing relationship exists between Dzyaloshinskii-Moriya interaction and single-ion anisotropy.
Conclusions:
- Bulk BiFeO3 is a highly significant multiferroic material with unique properties.
- Understanding its spin and lattice dynamics, along with magneto-electric coupling, is crucial for future applications.
- The complex interplay of magnetic interactions dictates its exotic magnetic structure.
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