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Correlations Between Optical Transmission and Magnetic Properties of Doped and Undoped GaMnN

Published online by Cambridge University Press:  01 February 2011

Amr M. Mahros ,
M. O. Luen ,
A. Emara ,
E. A. Berkman ,
F. E. Arkun ,
X. Zhang ,
J. Muth ,
N. A. El-Masry  and
S. M. Bedair
Amr M. Mahros
Affiliation:
aelarya@ncsu.edu, NC State University, Electrical and Computer Engineering Department,, Raleigh, NC, 27695, United States
M. O. Luen
Affiliation:
moluen@ncsu.edu, NC State University, Electrical and Computer Engineering Department, Raleigh, NC, 27695, United States
A. Emara
Affiliation:
aemara@ncsu.edu, NC State University, Electrical and Computer Engineering Department, Raleigh, NC, 27695, United States
E. A. Berkman
Affiliation:
eaberkma@ncsu.edu, NC State University, Materials Science and Engineering Department, Raleigh, NC, 27695, United States
F. E. Arkun
Affiliation:
aelarya@ncsu.edu, NC State University, Materials Science and Engineering Department, Raleigh, NC, 27695, United States
X. Zhang
Affiliation:
aelarya@ncsu.edu, NC State University, Electrical and Computer Engineering Department,, Raleigh, NC, 27695, United States
J. Muth
Affiliation:
aelarya@ncsu.edu, NC State University, Electrical and Computer Engineering Department, Raleigh, NC, 27695, United States
N. A. El-Masry
Affiliation:
aelarya@ncsu.edu, NC State University, Materials Science and Engineering Department, Raleigh, NC, 27695, United States
S. M. Bedair
Affiliation:
bedair@eos.ncsu.edu, NCSU, Electrical & Computer Engineering, Raleigh, NC 27695, Raleigh, NC, 27695, United States
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Abstract

Ferromagnetism (FM) in GaMnN was found to be related to the position of the Fermi level relative to the Mn deep-level band. The location of the Fermi level can be altered by doping GaMnN with Si (n-type) and Mg (p-type) dopants, resulting in a ferromagnetic to paramagnetic transformation. We have found that this manipulation of the Fermi level also can affect the optical properties of GaMnN, GaMnN: Mg and GaMnN: Si. The major optical absorption bands were found either to be enhanced or diminished depending on the level and nature of the doping elements. Therefore, a correlation between optical properties and saturation magnetization of GaMnN can be established.

Keywords

ferromagneticmagnetic propertiesoptical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 999: Symposium K – Novel Semiconductor Materials for Room-Temperature Ferromagnetism , 2007 , 0999-K06-06
Copyright
Copyright © Materials Research Society 2007

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References

Refreneces

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