Reduction of Threshold Current Density for Current-Driven Domain Wall Motion using Shape Control
نویسندگان
چکیده
منابع مشابه
Current-Driven Domain Wall Motion: Velocity, Current and Phase Transition
The relation between domain wall motion and intensity of driven current is examined in a phenomenological theory where the kinetic energy is expanded as a series of polynomial function of current density just as the Landau phase transition theory. The dependency of velocity on current density is square root which degenerates into linear if the current is much higher than the critical value. The...
متن کاملDependence of domain-wall depinning threshold current on pinning profile.
We have investigated the threshold current density required for depinning a domain wall from constrictions in NiFe nanowires, which give rise to pinning potentials of fixed amplitude but variable profile. We observed it to vary linearly with the angle of the triangular constriction. These results are reproduced using micromagnetic simulations including the adiabatic and nonadiabatic spin-torque...
متن کاملThreshold Current of Domain Wall Motion under Extrinsic Pinning , β - Term and Non - Adiabaticity
Graduate School of Science, Tokyo Metropolitan University 1-1 Minamiosawa, Hachioji, Tokyo 192-0397 PRESTO, JST, 4-1-8 Honcho Kawaguchi, Saitama 332-0012 3 Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531 4 Frontier Research System (FRS), The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 351-0198 5 Department of Computer Scien...
متن کاملGeometry-dependent scaling of critical current densities for current-induced domain wall motion and transformations
L. Heyne,l 1. Rhensius,l,2 Y-J, Cho,3 D, Bedau,l,3 S. Krzyk,l C. Dette,1 H. S. Korner,1 1. Fischer,1 M. Laufenberg,l D. Backes,1,2 L. J. Heyderman,2 L. Joly,2,4 F. Nolting,2 G. Tatara,5 H. Kohno,6 S. Seo,3 U. RUdiger,l and M. Kliiui l IFachbereich Physik, Universitiit Konstanz, 78457 Konstanz, Germany 2Paul Scherrer lnstitut, 5232 Villigen, Switzerland 3Samsung Electronics, San 14-1, Nongseo-do...
متن کاملDirect observation of high velocity current induced domain wall motion
We study fast vortex wall propagation in Permalloy wires induced by 3 ns short current pulses with sub 100 ps rise time using high resolution magnetic imaging at zero field. We find a constant domain wall displacement after each current pulse as well as current induced domain wall structure changes, even at these very short timescales. The domain wall velocities are found to be above 100 m/s an...
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: Japanese Journal of Applied Physics
سال: 2006
ISSN: 0021-4922,1347-4065
DOI: 10.1143/jjap.45.3850