Magnetic anisotropy of quaternary GaMnAsP ferromagnetic semiconductor oleh Hakjoon Lee, Jihoon Chang, Phunvira Chongthanaphisut, Sangyeop Lee, Seonghoon Choi, Seul-Ki Bac, Alviu R. Nasir, Sanghoon Lee, A. Pardo, Sining Dong, X. Li, X. Liu, J. K. Furdyna, M. Dobrowolska