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Title: Linear magnetic flux amplifier
Authors: Golubovic, DS ×
Moshchalkov, Victor #
Issue Date: Oct-2005
Publisher: AMER INST PHYSICS
Series Title: Applied Physics Letters vol:87 issue:14
Conference: date:Katholieke Univ Leuven, INPAC, Nanoscale Superconduct & Magnetism Grp, Lab Solid State Phys & Magnetism, B-3001 Louvain, Belgium
Abstract: By measuring the critical current versus the applied magnetic field I-c(Phi) of an Al superconducting loop enclosing a soft Permalloy magnetic dot, we demonstrate that it is feasible to design a linear magnetic flux amplifier for applications in superconducting quantum interference devices. The selected dimensions of a single-domain Permalloy dot provide that the preferential orientation of the magnetization is rotated from the perpendicular direction. By increasing an applied magnetic field, the magnetization of the dot coherently rotates toward the out-of-plane direction, thus providing a flux gain and an enhancement of the sensitivity. As a result of a pronounced shape anisotropy, the flux gain generated by the dot can be tuned by adjusting the dimensions of the dot. (C) 2005 American Institute of Physics.
ISSN: 0003-6951
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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