Volume 122, Number 3, May 2018
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||27 June 2018|
Re-orientation of the easy axis in φ0-junction
1 BLTP, JINR - Dubna, Moscow Region, 141980, Russia
2 Dubna State University - Dubna, Russia
3 Moscow Institute of Physics and Technology - Institutsky lane 9, Dolgoprudny, Moscow region, 141700, Russia
4 Umarov Physical Technical Institute, TAS - Dushanbe, 734063, Tajikistan
5 Department of Physics, University of South Africa - Private Bag X6, Florida 1710, South Africa
6 University Bordeaux, LOMA UMR- CNRS 5798 - F-33405 Talence Cedex, France
7 Department of Materials Science and Metallurgy, University of Cambridge - CB3 0FS, Cambridge, UK
Received: 18 April 2018
Accepted: 25 May 2018
We study theoretically a dynamics of the -Josephson junction, with direct coupling between magnetic moment and Josephson current, which shows features reminiscent of a Kapitza pendulum. We find that, starting with the magnetization along the z-axis, the character of the magnetization dynamics changes crucially as a stable position of the magnetic moment is realized between the z- and y-axes, depending on the values of the system parameters. Changes in critical current and spin-orbit interaction lead to different stability regions for the magnetization. Excellent agreement is obtained between analytical and numerical results at low values of the Josephson–to–magnetic-energy ratio.
PACS: 74.50.+r – Tunneling phenomena; Josephson effects / 85.25.-j – Superconducting devices / 85.25.Cp – Josephson devices
© EPLA, 2018
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