Growth Parameter Dependence of Structural Characterizations of Diluted Magnetic Semiconductor (Ga, Cr)As
Data(s) |
15/10/2010
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Resumo |
We report the influence of growth parameters and post-growth annealing on the structural characterizations and magnetic properties of (Ga, Cr)As films. The crystalline quality and magnetic properties are sensitive to the growth conditions. The single-phase (Ga, Cr)As film with the Curie temperature of 10 K is synthesized at growth temperature T-s = 250 degrees C and with nominal Cr content x = 0.016. However, for the films with x > 0.02, the aggregation of Cr atoms is strongly enhanced as both T. and x increase, which not only brings strong compressive strain in the epilayer, but also roughens the surface. The origin of room-temperature ferromagnetism in (Ga, Cr)As films with nanoclusters is also discussed. We report the influence of growth parameters and post-growth annealing on the structural characterizations and magnetic properties of (Ga, Cr)As films. The crystalline quality and magnetic properties are sensitive to the growth conditions. The single-phase (Ga, Cr)As film with the Curie temperature of 10 K is synthesized at growth temperature T-s = 250 degrees C and with nominal Cr content x = 0.016. However, for the films with x > 0.02, the aggregation of Cr atoms is strongly enhanced as both T. and x increase, which not only brings strong compressive strain in the epilayer, but also roughens the surface. The origin of room-temperature ferromagnetism in (Ga, Cr)As films with nanoclusters is also discussed. zhangdi于2010-03-09批量导入 zhangdi于2010-03-09批量导入 [Lu, J.; Bi, J. F.; Wang, W. Z.; Gan, H. D.; Meng, H. J.; Deng, J. J.; Zheng, H. Z.; Zhao, J. H.] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China |
Identificador | |
Idioma(s) |
英语 |
Publicador |
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC 445 HOES LANE, PISCATAWAY, NJ 08855 USA |
Fonte |
Lu, J;Bi, JF;Wang, WZ;Gan, HD;Meng, HJ;Deng, JJ;Zheng, HZ;Zhao, JH.Growth Parameter Dependence of Structural Characterizations of Diluted Magnetic Semiconductor (Ga, Cr)As .见:IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC .IEEE TRANSACTIONS ON MAGNETICS,445 HOES LANE, PISCATAWAY, NJ 08855 USA ,39753,44 (11): 2692-2695 Part 1 NOV |
Palavras-Chave | #半导体物理 #Magnetic analysis |
Tipo |
会议论文 |