Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


miami1249688084.pdf (2.03 MB)

ETD Abstract Container

Abstract Header

Transport Studies In The Ferromagnetic Semiconductor (Ga,Mn)As

Opondo, Noah F.
http://rave.ohiolink.edu/etdc/view?acc_num=miami1249688084

Abstract Details

2009, Master of Science, Miami University, Physics.
We present experimental research on magneto-transport on micro and nanostructures based on the ferromagnetic semiconductor (Ga,Mn)As, as well as macroscopic (un-patterned) samples. We report the values of contact resistance measurements between (Ga,Mn)As with different materials; copper, silver and aluminum. Copper gave relatively high values of contact resistance whereas aluminum gave extremely high values. Our values for specific resistance for silver of ~10-8 Ωcm2 are very low and agree with literature. We also report a process for the fabrication of the non local spin valves (NLSV’s) using electron beam lithography. Finally we present our studies of the effect of native and grown oxides on the Curie temperature and resistivity of (Ga,Mn)As. Our results show that etching the oxide and annealing at temperatures close to growth temperatures enhances the Curie temperature and reduces the resistivity of the samples. The repeated anneal etch process improves the Curie temperature fast compared to continuous annealing.
Khalid F. Eid, PhD (Advisor)
Jan Yarrison-Rice, PhD (Committee Member)
Samir Bali, PhD (Committee Member)
68 p.
Physics
Contact resistance; non local spin valves; (Ga,Mn)As; etch-anneal

Recommended Citations

Citations

  • Opondo, N. F. (2009). Transport Studies In The Ferromagnetic Semiconductor (Ga,Mn)As [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1249688084

    APA Style (7th edition)

  • Opondo, Noah. Transport Studies In The Ferromagnetic Semiconductor (Ga,Mn)As. 2009. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1249688084.

    MLA Style (8th edition)

  • Opondo, Noah. "Transport Studies In The Ferromagnetic Semiconductor (Ga,Mn)As." Master's thesis, Miami University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=miami1249688084

    Chicago Manual of Style (17th edition)

miami1249688084
604
© 2009, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.