Observation of a Transition From Inverse-Spin-Switch to Spin-Switch Behavior in Domain State of a Py/Nb/Py Trilayer

Title
Observation of a Transition From Inverse-Spin-Switch to Spin-Switch Behavior in Domain State of a Py/Nb/Py Trilayer
Author(s)
김동호황태종오상준[오상준]
Issue Date
201002
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE TRANSACTIONS ON MAGNETICS, v.46, no.2, pp.235 - 238
Abstract
We study spin switch behavior of the six bridges of bare, or pseudo spin-valve Py/Nb/Py trilayer prepared on a single chip. Magnetization measurement of both longitudinal and transverse moment on a large companion sample reveals that a significant amount of transverse component exists in the antiparallel domain ( AD) state, which is originated in stray magnetic field from domain walls. The stray magnetic field induces flux lines into the Nb layer and the motion of these flux lines under the force exerted by the bias current is the main origin for inverse spin switch effect observed in the AD state of most bridges. In addition to inverse spin switch effect, we observe a peculiar behavior of a transition from inverse spin switch to spin switch behavior with decreasing temperature in one of six bridges. In order to understand the extraordinary behavior, we first note that the flux pinning should be present in this particular sample to suppress the dissipation by flux motion, then we propose that when the domain structure incidentally matches underlying distribution of pinning sites, spin switch effect in the AD state can occur by domain wall superconductivity and/or proximity effect.
URI
http://hdl.handle.net/YU.REPOSITORY/22898http://dx.doi.org/10.1109/TMAG.2009.2032144
ISSN
0018-9464
Appears in Collections:
이과대학 > 물리학과 > Articles
기초교육대학 > 교양학부 > Articles
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