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Magnetotransport in GaMnAs Based Microstructures

Paudel, Bhim L.
http://rave.ohiolink.edu/etdc/view?acc_num=miami1331927548

Abstract Details

2011, Master of Science, Miami University, Physics.
We present experimental research on magneto-transport at Copper and GaMnAs interface. We report the values of specific contact resistance (ARc) between GaMnAs/Cu interfaces using Circular Transmission Line Method (CTLM) for a wide range of temperature (15K to 290K) above and below Curie temperature (Tc) which is at 145K. Our values of specific contact resistance are very low and close to the order of ~10-8 Ωcm2 which agrees with literature and changes abruptly to close to double of the value at Curie temperature when GaMnAs has phase transition between nonmagnetic to ferromagnetic. We suggest that this arises due to suppression of one of the two spin conduction channels when the phase transition of GaMnAs takes place. We also found the Specific contact resistance has a peak shifted towards lower temperature which suggests the magnetization in the GaMnAs film is suppressed near the Copper interface.
Khalid Eid, PhD (Advisor)
Michael Pechan, PhD (Committee Member)
Jan Yarrison-Rice, PhD (Other)
Herbert Jaeger, PhD (Other)
50 p.
Physics
Contact resistance; Transfer length; Circular Transmission Line Method; Magnetic Semiconductor

Recommended Citations

Citations

  • Paudel, B. L. (2011). Magnetotransport in GaMnAs Based Microstructures [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1331927548

    APA Style (7th edition)

  • Paudel, Bhim. Magnetotransport in GaMnAs Based Microstructures. 2011. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1331927548.

    MLA Style (8th edition)

  • Paudel, Bhim. "Magnetotransport in GaMnAs Based Microstructures." Master's thesis, Miami University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=miami1331927548

    Chicago Manual of Style (17th edition)

miami1331927548
594
© 2011, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.