Magnetic structures and half-metallicity at zincblende ferromagnetic/antiferromagnetic interfaces: Role of tetragonal distortions

作者：Nakamura Kohji^*; Akiyama Toru; Ito Tomonori; Freeman A J

来源：Journal of Magnetism and Magnetic Materials, 2007, 310(2): 2186-2188.

DOI：10.1016/j.jmmm.2006.10.753

• exchange bias
• half-metal
• transition-metal chalcogenide

In our search for half-metallic exchange bias interfaces, we determined magnetic structures at ferromagnetic (FM)/antiferromagnetic (AFM) interfaces in zincblende transition-metal chalcogenides, CrSe/MnSe and CrTe/MnTe, by means of the first principles full-potential linearized augmented plane-wave method, including the effect of a tetragonal distortion that may be induced in epitaxial growth. The tetragonal distortion with c/a < 1 in both MnSe and MnTe is found to prefer the uncompensated AFM interface while that with c/a > 1, the compensated AFM interface. With the uncompensated AFM interface, an antiparallel alignment of the Cr and Mn moments induces an excellent half-metallicity at the interface even when the tetragonal distortion is included.

• 出版日期2007-3
• 单位西北大学