Magnetic moment manipulation by a Josephson current

Details Magnetic moment manipulation by a Josephson current Magnetic moment manipulation by a Josephson current

2008-10-23

arxiv.org/abs/0810.4286v3

Physical Review Letters 102 (2009) 017001

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.102.017001

We consider a Josephson junction where the weak-link is formed by a non-centrosymmetric ferromagnet. In such a junction, the superconducting current acts as a direct driving force on the magnetic moment. We show that the a.c. Josephson effect generates a magnetic precession providing then a feedback to the current. Magnetic dynamics result in several anomalies of current-phase relations (second harmonic, dissipative current) which are strongly enhanced near the ferromagnetic resonance frequency.

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