Abstract
We have investigated the magnetization reorientation process of GaMnAs ferromagnetic films by changing external field direction in planar Hall effect (PHE) measurement. While the angular dependences of PHE data taken with clockwise and counterclockwise under strong magnetic field (i.e., above 400 Oe) are completely overlapped without hysteresis, they are significantly different under small magnetic field (i.e., below 50 Oe) by exhibiting nonabrupt hysteresis. We have analyzed such angular dependence of PHE using the magnetic free energy based on Stoner-Wohlfarth model. The behavior observed under the high field was well understood in terms of coherent rotation of magnetization in the form of single domain. However, the nonabrupt hysteric behavior observed with low field cannot be explained by a single domain picture and requires involvement of multidomain structures.
| Original language | English |
|---|---|
| Article number | 07D101 |
| Journal | Journal of Applied Physics |
| Volume | 103 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2008 Apr 21 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
Cite this
Single and multidomain characteristics of GaMnAs investigated by magnetotransport measurements. / Kim, Jungtaek; Shin, D. Y.; Yoo, Taehee; Kim, Hyungchan; Lee, Sang Hoon; Liu, X.; Furdyna, J. K.
In: Journal of Applied Physics, Vol. 103, No. 7, 07D101, 21.04.2008.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Single and multidomain characteristics of GaMnAs investigated by magnetotransport measurements
AU - Kim, Jungtaek
AU - Shin, D. Y.
AU - Yoo, Taehee
AU - Kim, Hyungchan
AU - Lee, Sang Hoon
AU - Liu, X.
AU - Furdyna, J. K.
PY - 2008/4/21
Y1 - 2008/4/21
N2 - We have investigated the magnetization reorientation process of GaMnAs ferromagnetic films by changing external field direction in planar Hall effect (PHE) measurement. While the angular dependences of PHE data taken with clockwise and counterclockwise under strong magnetic field (i.e., above 400 Oe) are completely overlapped without hysteresis, they are significantly different under small magnetic field (i.e., below 50 Oe) by exhibiting nonabrupt hysteresis. We have analyzed such angular dependence of PHE using the magnetic free energy based on Stoner-Wohlfarth model. The behavior observed under the high field was well understood in terms of coherent rotation of magnetization in the form of single domain. However, the nonabrupt hysteric behavior observed with low field cannot be explained by a single domain picture and requires involvement of multidomain structures.
AB - We have investigated the magnetization reorientation process of GaMnAs ferromagnetic films by changing external field direction in planar Hall effect (PHE) measurement. While the angular dependences of PHE data taken with clockwise and counterclockwise under strong magnetic field (i.e., above 400 Oe) are completely overlapped without hysteresis, they are significantly different under small magnetic field (i.e., below 50 Oe) by exhibiting nonabrupt hysteresis. We have analyzed such angular dependence of PHE using the magnetic free energy based on Stoner-Wohlfarth model. The behavior observed under the high field was well understood in terms of coherent rotation of magnetization in the form of single domain. However, the nonabrupt hysteric behavior observed with low field cannot be explained by a single domain picture and requires involvement of multidomain structures.
UR - http://www.scopus.com/inward/record.url?scp=42149170657&partnerID=8YFLogxK
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U2 - 10.1063/1.2828532
DO - 10.1063/1.2828532
M3 - Article
VL - 103
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 7
M1 - 07D101
ER -