Magnetic moment manipulation by a Josephson current.
We consider a Josephson junction where the weak link is formed by a noncentrosymmetric ferromagnet. In such a junction, the superconducting current acts as a direct driving force on the magnetic moment. We show that the ac 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.
Konschelle
F
F
Condensed Matter Theory Group, CPMOH, Université de Bordeaux and CNRS, F-33405 Talence, France.
Buzdin
A
A