Direct observation on the temperature-dependent change of magnetic domains in epitaxial MnAs film on GaAs (001).
We present a systematic change of the magnetic domain structure with temperature in epitaxial ferromagnetic MnAs film on GaAs (001), observed in a wide temperature range of 15-45 degrees C by magnetic force microscopy. Interestingly, it is found that, as temperature increases, the domain structure within the ferromagnetic alpha-MnAs stripes shows a mixture of head-on and simple domains at 15 degrees C and then, takes a complete transition to simple ones above 15 degrees C. This change could be understood by change in the demagnetizing factor of the cross-section of the ferromagnetic stripes with temperature.
Quantum Photonic Science Research Center and BK21 Program Division of Advanced Research and Education in Physics, Hanyang University, Seoul 133-791, Republic of Korea.
JinBae
J
Kim
YoungPak
Y
Lee
Kwang-Su
KS
Ryu
Sung-Chul
SC
Shin
Hiro
H
Akinaga
Joo Yull
JY
Rhee