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Microwave probe stations with throw-dimensional control of the magnetic field to study high-frequency dynamic in nanoscale devices

Journal article
Authors S. A. H. Banuazizi
Johan Åkerman
Published in Review of Scientific Instruments
Volume 89
Issue 6
ISSN 0034-6748
Publication year 2018
Published at Department of Physics (GU)
Language en
Links dx.doi.org/10.1063/1.5032219
Keywords octupole magnet, design, oscillators, performance, Instruments & Instrumentation, Physics
Subject categories Physical Sciences

Abstract

We present two microwave probe stations with motorized rotary stages for adjusting the magnitude and angle of the applied magnetic field. In the first system, the magnetic field is provided by an electromagnet and can be adjusted from 0 to similar to 1.4 T while its polar angle (theta) can be varied from 0 degrees to 360 degrees. In the second system the magnetic field is provided by a Halbach array permanent magnet, which can be rotated and translated to cover the full range of polar (theta) and azimuthal (phi) angles with a tunable field magnitude up to similar to 1 T. Both systems are equipped with microwave probes, bias-Ts, amplifiers, and spectrum analyzers, to allow for microwave characterization up to 40 GHz, as well as software to automatically perform continuous large sets of electrical and microwave measurements. Published by AIP Publishing.

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