Magnetoresistance effect and interlayer coupling of „ Ga , Mn ... As trilayer structures

@inproceedings{Chiba2000MagnetoresistanceEA,
  title={Magnetoresistance effect and interlayer coupling of „ Ga , Mn ... As trilayer structures},
  author={Daichi Chiba and Norimitsu Akiba and Yasuo Ohno and H. Ohnob},
  year={2000}
}
We have investigated the magnetic and magnetotransport properties of ~Ga, Mn!As/~Al, Ga!As/ ~Ga, Mn!As semiconductor-based magnetic trilayer structures. We observe a weak ferromagnetic interlayer coupling between the two ferromagnetic ~Ga, Mn!As layers as well as magnetoresistance effects due to spin-dependent scattering and to spin-dependent tunneling. Both the coupling strength and the magnetoresistance ratio decrease with the increase of temperature and/or the increase of Al composition of… CONTINUE READING