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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2008, Volume 88, Issue 12, Pages 927–933
(Mi jetpl321)
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CONDENSED MATTER
Proximity-driven source of highly spin-polarized ac current on the basis of superconductor/weak ferromagnet/superconductor voltage-biased Josephson junction
A. M. Bobkov, I. V. Bobkova Institute of Solid State Physics RAS, Chernogolovka, Moscow region, 142432, Russia
Abstract:
We theoretically investigate an opportunity to implement a source of highly spin-polarized ac current on the basis of superconductor/weak ferromagnet/superconductor (SFS) voltage-biased junction in the regime of essential proximity effect and calculate the current flowing through the probe electrode tunnel coupled to the ferromagnetic interlayer region. It is shown that while the polarization of the dc current component is generally small in case of weak exchange field of the ferromagnet, there is an ac component of the current in the system. This ac current is highly spin-polarized and entirely originated from the non-equilibrium proximity effect in the interlayer. The frequency of the current is controlled by the voltage applied to SFS junction. We discuss
a possibility to obtain aЁsource of coherent ac currents with a certain phase shift between them by tunnel coupling two probe electrodes at different locations of the interlayer region.
Received: 31.10.2008 Revised: 11.11.2008
Citation:
A. M. Bobkov, I. V. Bobkova, “Proximity-driven source of highly spin-polarized ac current on the basis of superconductor/weak ferromagnet/superconductor voltage-biased Josephson junction”, Pis'ma v Zh. Èksper. Teoret. Fiz., 88:12 (2008), 927–933; JETP Letters, 88:12 (2008), 807–813
Linking options:
https://www.mathnet.ru/eng/jetpl321 https://www.mathnet.ru/eng/jetpl/v88/i12/p927
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Abstract page: | 154 | Full-text PDF : | 62 | References: | 45 |
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