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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
Published on: August 15, 2018
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The melilite-type compound (A = K, La) being a room temperature ferromagnetic semiconductor.
Huan-Cheng Yang1, Ben-Chao Gong1, Kai Liu1
1Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China, Beijing 100872, China.
Science Bulletin
|January 20, 2023
Summary
Scientists developed new room temperature ferromagnetic semiconductors using Sr2MnGe2S6O with K or La doping. These materials exhibit ferromagnetic order above 300 K, enabling advanced electronic and magnetic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Solid-State Chemistry
Background:
- The quest for room temperature ferromagnetic semiconductors is ongoing.
- These materials integrate electronic, optical, and magnetic properties for advanced devices.
Purpose of the Study:
- To predict new high-temperature ferromagnetic semiconductors.
- To explore doping strategies for achieving desired magnetic properties.
Main Methods:
- Spin-polarized density functional theory calculations.
- Investigating melilite-type oxysulfide Sr2MnGe2S6O.
- Employing hole (K) and electron (La) doping.
Main Results:
- Predicted new ferromagnetic semiconductors based on Sr2MnGe2S6O.
- Suppressed weak antiferromagnetic order via charge doping.
- Achieved Curie temperatures (Tc) above 300 K at 25% doping concentration for both p-type and n-type carriers.
Conclusions:
- Charge doping effectively induces ferromagnetic order in Sr2MnGe2S6O.
- Provides an effective strategy for discovering new high-temperature ferromagnetic semiconductors.
Keywords:
Density functional theory calculationsElectron dopingFerromagnetic semiconductorHole dopingMeliliteMore Related Videos
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