Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3469999
Keywords
ferromagnetic materials; magnetic traps; magnetic tunnelling; magnetisation; oscillators; resonant tunnelling; semiconductor quantum wells; semimagnetic semiconductors; spin polarised transport
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Funding
- DFG [SFB 689]
- FWF [P21289-N16]
- Austrian Science Fund (FWF) [P21289] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 21289] Funding Source: researchfish
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The highly nonlinear coupling of transport and magnetic properties in a multiwell heterostructure, which comprises ferromagnetic quantum wells made of diluted magnetic semiconductors, is theoretically investigated. The interplay of resonant tunneling and carrier-mediated ferromagnetism in the magnetic wells induces very robust, self-sustained current and magnetization oscillations. Over a large window of steady bias voltages the spin polarization of the collector current is oscillating between positive and negative values, realizing a spin oscillator device. (C) 2010 American Institute of Physics. [doi:10.1063/1.3469999]
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