鐵磁性半導體砷化鎵錳的磁性及傳輸性質研究

Magnetic and Transport properties of ferromagnetic semiconducotrs (Ga,Mn)As

張俊傑(CHUN CHIEH,CHANG)

指導教授 ： 張顏暉

國立臺灣大學/理學院/物理研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.01238

摘要

無

關鍵字

鐵磁性半導體

並列摘要

In this thesis, magnetic properties of five (Ga,Mn)As samples are studied from SQUID measurements. The clear and square hysteresis indicates that ferromagnetic order exists in these layers. Temperature dependence of magnetization shows that the transition temperature Tc is increasing with higher Mn concentration. The results of magneto-transport properties show that these ferromagnetic samples reside close to the metal-insulator transition boundary, and the anomalous Hall effect is dominant. Besides, the infrared and far infrared transmission and reflectance spectrum have been measured between 0 and 13000 cm-1 at room temperature using FTIR. A broad absorption peak around 1700 cm-1 is observed and regarded as the impurity-related absorption. This peak moves to higher frequency with
increasing Mn composition.

並列關鍵字

ferromagnetic semiconductor

參考文獻

Chapter 1

1. D.D Awschalom, D. Loss and N. Smamarth, Semiconductor Spintronics and

Quantum Computation, Springer publishing company

2. T. Kasuya and A. Yanase, Rev. Mod. Physics, 40, 684 (1968)

4. Shibata N., A. Ohki and A. Katsui, 1988, J. Cryst. Growth 93, 703