A three-junction SQUID-on-tip with tunable in-plane and out-of-plane magnetic field sensitivity

Nanoscale superconducting quantum interference devices (SQUIDs) demonstrate record sensitivities to small magnetic moments, but are typically sensitive only to the field component that is normal to the plane of the SQUID and out-of-plane with respect to the scanned surface. We report on a nanoscale...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2014-10
Main Authors: Anahory, Yonathan, Reiner, Jonathan, Embon, Lior, Halbertal, Dorri, Yakovenko, Anton, Myasoedov, Yuri, Rappaport, Michael L, Huber, Martin E, Zeldov, Eli
Format: Article
Language:English
Subjects:
Interference
Magnetic fields
Magnetic moments
Magnetism
Sensitivity analysis
Superconducting quantum interference devices
Two dimensional analysis
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Nanoscale superconducting quantum interference devices (SQUIDs) demonstrate record sensitivities to small magnetic moments, but are typically sensitive only to the field component that is normal to the plane of the SQUID and out-of-plane with respect to the scanned surface. We report on a nanoscale three-junction Pb SQUID which is fabricated on the apex of a sharp tip. Because of its three-dimensional structure, it exhibits a unique tunable sensitivity to both in-plane and out-of-plane fields. We analyze the two-dimensional interference pattern from both numerical and experimental points of view. This device is integrated into a scanning microscope and its ability to independently measure the different components of the magnetic field with outstanding spin sensitivity better than \(5\ \frac{\mu_B}{\mathrm{Hz}^{1/2}}\) is demonstrated. This highlights its potential as a local probe of nanoscale magnetic structures.
ISSN:2331-8422
DOI:10.48550/arxiv.1410.1609