Spiral Exchange Interaction in Diluted Magnetic Semiconductor Junction

Abstract

We studied the exchange interactions mediated by polarized itinerant carriers in diluted magnetic semiconductor (DMS) junction. In contrast to the ordinary RKKY oscillations, the induced moment possesses an interesting spiral motion, accompanied with angular oscillations. The spiral motion remains robust in the entire $T<T_c$ regime while the oscillatory motion gets enhanced as $T\to T_c$. To explore the novel phenomena, we propose a ferromagnet/DMS/ferromagnet junction would bring out interesting spin-dependent transport properties and possible applications in spintronics.

3 pages, REVTeX, 4 figures

References in corpus (5)

• High Curie temperature GaMnAs obtained by resistance-monitored annealing
• Highly enhanced Curie temperatures in low temperature annealed (Ga,Mn)As epilayers
• Theory of Diluted Magnetic Semiconductor Ferromagnetism
• Ferromagnetism in magnetically doped III-V semiconductors
• Limits on the Curie temperature of (III,Mn)V ferromagnetic semiconductors

Cited by in corpus (5)

• Decoherence of localized spins interacting via RKKY interaction
• Softening of Spin-Wave Stiffness near the Ferromagnetic Phase Transition in Diluted Magnetic Semiconductors
• Non-collinear Exchange Coupling in Trilayer Magnetic Junction and its Connection to Fermi Surface Topology
• Spatial trends of non-collinear exchange coupling mediated by itinerant carriers with different Fermi surfaces
• Spiral Exchange Coupling in Trilayer Magnetic Junction Mediated by Diluted-Magnetic-Semiconductor Thin Film