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Single-Crystalline Diluted Magnetic Semiconductor GaN:Mn Nanowires
H-J Choi1, H-K Seong1,2, J Chang2
1School of Advanced Materials Science and Engineering, Yonsei University, Seoul 120-749, Korea.
Advanced Materials (Deerfield Beach, Fla.)
|August 20, 2021
Summary
Researchers developed single-crystalline diluted magnetic semiconductor gallium nitride nanowires with manganese (GaN:Mn). These nanowires show room-temperature magnetism and spin transport, enabling new electronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Diluted magnetic semiconductors (DMS) are crucial for spintronics.
- Gallium nitride (GaN) is a promising semiconductor material.
- Achieving room-temperature ferromagnetism in DMS remains a challenge.
Purpose of the Study:
- To synthesize single-crystalline diluted magnetic semiconductor GaN:Mn nanowires.
- To investigate the magnetic and transport properties of these nanowires.
- To explore their application in electronic devices.
Main Methods:
- Controlled synthesis of GaN:Mn nanowires with varying manganese concentrations.
- Characterization of structural, magnetic, and electrical properties.
- Fabrication of GaN:Mn/n-SiC based light-emitting diodes.
Main Results:
- Successfully synthesized single-crystalline GaN:Mn nanowires.
- Observed Curie temperatures above room temperature.
- Demonstrated magnetoresistances near room temperature and spin-dependent transport.
- Incorporated nanowires into functional light-emitting diodes.
Conclusions:
- Single-crystalline GaN:Mn nanowires exhibit promising room-temperature diluted magnetic semiconductor properties.
- These nanowires are viable building blocks for spintronic devices.
- The developed materials pave the way for novel GaN-based electronic applications.
