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Ferromagnetic ordering in Mn induced by thermal strain
- Hwang, Younghun;
- Choi, Jeongyong;
- Hong, Soon Cheol;
- Cho, Sunglae;
- Han, Suk-Hee;
- ... Jung, Myung-Wha;
- 외 1명
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23초록
We report that the thermal strain due to the thermal-expansion difference between a Mn film and a semiconductor substrate is strong enough to overcome the thermal energy for a paramagnetic (PM) state and also to break antiferromagnetic (AF) magnetic symmetry, inducing ferromagnetic (FM) ordering at high temperatures. A Mn film on GaAs (100) showed FM ordering up to 9000 A with a Curie temperature (T-C) of over 750 K and a net magnetic moment of 0.33 mu(B)/Mn, instead of AF (Neel temperature, T-N=95 K) and PM orderings in bulk.
키워드
antiferromagnetic materials; Curie temperature; ferromagnetic materials; high-temperature effects; magnetic moments; magnetic thin films; manganese; metallic thin films; Neel temperature; paramagnetic materials; thermal expansion; MAGNETIC-PROPERTIES; ATOMIC DISORDER; ALPHA-MN; TRANSITION; FE; SURFACE; STATE
- 제목
- Ferromagnetic ordering in Mn induced by thermal strain
- 저자
- Hwang, Younghun; Choi, Jeongyong; Hong, Soon Cheol; Cho, Sunglae; Han, Suk-Hee; Shin, Kyung-Ho; Jung, Myung-Wha
- 발행일
- 2009-01
- 유형
- Article
- 권
- 79
- 호
- 4