Easy axis reorientation and magneto-crystalline anisotropic resistance of tensile strained (Ga,Mn)As films

We present a study of magnetic anisotropy by using magneto-transport and direct magnetization measurements on tensile strained (Ga,Mn)As films. The magnetic easy axis of the films is in-plane at low temperatures, while the easy axis flips to out-of-plane when temperature is raised or hole concentration is increased. This easy axis reorientation is explained qualitatively in a simple physical picture by Zeners pd model. In addition, the magneto-crystalline anisotropic resistance was also investigated experimentally and theoretically based on the single magnetic domain model. The dependence of sheet resistance on the angle between the magnetic field and [1 0 0] direction was measured. It is found that the magnetization vector M in the single-domain state deviates from the external magnetic field H direction at low magnetic field, while for high magnetic field, M continuously moves following the field direction, which leads to different resistivity function behaviors.

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-09-07T12:57:06Z No. of bitstreams: 1 Easy axis reorientation and magneto-crystalline anisotropic resistance of tensile strained (Ga,Mn)As films.pdf: 850485 bytes, checksum: efae9880759effb5c72bb9d316ba8309 (MD5)

Approved for entry into archive by 阎军(yanj@red.semi.ac.cn) on 2010-09-07T13:11:09Z (GMT) No. of bitstreams: 1 Easy axis reorientation and magneto-crystalline anisotropic resistance of tensile strained (Ga,Mn)As films.pdf: 850485 bytes, checksum: efae9880759effb5c72bb9d316ba8309 (MD5)

Made available in DSpace on 2010-09-07T13:11:09Z (GMT). No. of bitstreams: 1 Easy axis reorientation and magneto-crystalline anisotropic resistance of tensile strained (Ga,Mn)As films.pdf: 850485 bytes, checksum: efae9880759effb5c72bb9d316ba8309 (MD5) Previous issue date: 2010

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