Josephson effect in SIFS tunnel junctions with domain walls in the weak link region
نویسندگان
چکیده
منابع مشابه
Superelliptic Josephson Tunnel Junctions
The most important practical characteristic of a Josephson junction is its critical current. The shape of the junction determines the specific form of the magnetic-field dependence of the its Josephson current. Here we address the magnetic diffraction patterns of specially shaped planar Josephson tunnel junctions. We focus on a wide ensemble of generalized ellipses, called superellipses, which ...
متن کاملJosephson effect in small - area superconducting tunnel junctions at 604
We have measured the ac Josephson effect in small-area superconducting tunnel junctions at 604 GHz (A = 496pm) using a resonant planar dipole antenna to couple the radiation into the junction. In a 176-fl junction, we have observed up to the 7th Josephson step (at 8.75 m V), a performance comparable to that seen in point contacts. We also compare our data with the results of the RSJ model and o...
متن کاملSpin Josephson effect in ferromagnet/ferromagnet tunnel junctions
– We consider the tunnel current between two ferromagnetic metals from a perspective similar to the one used in superconductor/superconductor tunnel junctions. We use fundamental arguments to derive a Josephson-like tunnel spin current I J ∝ sin(θ1 − θ2). Here the phases are associated with the planar contribution to the magnetization, 〈c†↑c↓〉 ∼ e . The crucial step in our analysis is the fact ...
متن کاملJosephson Effect in SFXSF Junctions
We investigate the Josephson effect in SFXSF junctions, where SF is a superconducting material with a ferromagnetic exchange field, and X is a weak link. The critical current Ic increases with the (antiparallel) exchange fields, if the distribution of transmission eigenvalues of the X layer has its maximum weight at small values. This exchange-field enhancement of the supercurrent does not exis...
متن کاملZurek-Kibble domain structures: the dynamics of spontaneous vortex formation in annular Josephson tunnel junctions.
Phase transitions create a domain structure with defects, which has been argued by Zurek and Kibble (ZK) to depend in a characteristic way on the quench rate. We present an experiment to measure the ZK scaling exponent sigma. Using long symmetric Josephson tunnel junctions, for which the predicted index is sigma=0.25, we find sigma=0.27+/-0.05. Further, we agree with the ZK prediction for the o...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: JETP Letters
سال: 2015
ISSN: 0021-3640,1090-6487
DOI: 10.1134/s0021364015110041