Abstract
We present the structural, electrical and magnetic properties in the (Al,Mn)N thin films with various Mn concentrations grown by plasma-enhanced molecular beam epitaxy. The X-ray diffraction patterns reveal that the (Al,Mn)N films have the wurtzite structure without secondary phases. The (Al 1-xMnx)N films with x = 1.7% and 2.6% were obviously found to exhibit the ferromagnetic ordering with Curie temperature exceeding room temperature while the film with x = 3.0% was observed to show the ferromagnetic ordering at 5K, indicating that a critical Mn concentration exists. Since all the films exhibit insulating characteristics, the origin of ferromagnetism in (Al,Mn)N might be attributed to indirect exchange interaction caused by virtual electron excitations from Mn acceptor level to the valence band within the samples.
| Original language | English |
|---|---|
| Pages (from-to) | 420-424 |
| Number of pages | 5 |
| Journal | Journal of Crystal Growth |
| Volume | 271 |
| Issue number | 3-4 |
| DOIs | |
| Publication status | Published - 2004 Nov 15 |
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All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry
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Observation of room-temperature ferromagnetism in (Al,Mn)N thin films. / Ham, Moon Ho; Yoon, Sukho; Park, Yongjo; Myoung, Jae Min.
In: Journal of Crystal Growth, Vol. 271, No. 3-4, 15.11.2004, p. 420-424.Research output: Contribution to journal › Article
TY - JOUR
T1 - Observation of room-temperature ferromagnetism in (Al,Mn)N thin films
AU - Ham, Moon Ho
AU - Yoon, Sukho
AU - Park, Yongjo
AU - Myoung, Jae Min
PY - 2004/11/15
Y1 - 2004/11/15
N2 - We present the structural, electrical and magnetic properties in the (Al,Mn)N thin films with various Mn concentrations grown by plasma-enhanced molecular beam epitaxy. The X-ray diffraction patterns reveal that the (Al,Mn)N films have the wurtzite structure without secondary phases. The (Al 1-xMnx)N films with x = 1.7% and 2.6% were obviously found to exhibit the ferromagnetic ordering with Curie temperature exceeding room temperature while the film with x = 3.0% was observed to show the ferromagnetic ordering at 5K, indicating that a critical Mn concentration exists. Since all the films exhibit insulating characteristics, the origin of ferromagnetism in (Al,Mn)N might be attributed to indirect exchange interaction caused by virtual electron excitations from Mn acceptor level to the valence band within the samples.
AB - We present the structural, electrical and magnetic properties in the (Al,Mn)N thin films with various Mn concentrations grown by plasma-enhanced molecular beam epitaxy. The X-ray diffraction patterns reveal that the (Al,Mn)N films have the wurtzite structure without secondary phases. The (Al 1-xMnx)N films with x = 1.7% and 2.6% were obviously found to exhibit the ferromagnetic ordering with Curie temperature exceeding room temperature while the film with x = 3.0% was observed to show the ferromagnetic ordering at 5K, indicating that a critical Mn concentration exists. Since all the films exhibit insulating characteristics, the origin of ferromagnetism in (Al,Mn)N might be attributed to indirect exchange interaction caused by virtual electron excitations from Mn acceptor level to the valence band within the samples.
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UR - http://www.scopus.com/inward/citedby.url?scp=7544243901&partnerID=8YFLogxK
U2 - 10.1016/j.jcrysgro.2004.08.004
DO - 10.1016/j.jcrysgro.2004.08.004
M3 - Article
AN - SCOPUS:7544243901
VL - 271
SP - 420
EP - 424
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 3-4
ER -