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Title: A nanoscale SQUID operating at high magnetic fields

Abstract

A washer-free Nb nanoSQUID has been developed for measuring magnetization changes from nanoscale objects. The SQUID loop is etched into a 250 nm wide Au/Nb bilayer track and the diameter of the SQUID hole is ~ 70 nm. In the presence of a magnetic field perpendicular to the plane of the SQUID, vortex penetration into the 250 nm wide track can be observed via the critical current–applied field characteristic and the value at which vortex first penetrates is consistent with the theoretical prediction. Upon removing the applied field, the penetrated vortices escape the track and the critical current at zero field is restored.

Authors:
; ;
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1037866
Report Number(s):
IS-J 7618
Journal ID: 1361-6528
DOE Contract Number:  
DE-AC02-07CH11358
Resource Type:
Journal Article
Journal Name:
Nanotechnology
Additional Journal Information:
Journal Volume: 22; Journal Issue: 45
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Lam, Simon K. H., Clem, John R, and Yang, Wenrong. A nanoscale SQUID operating at high magnetic fields. United States: N. p., 2011. Web. doi:10.1088/0957-4484/22/45/455501.
Lam, Simon K. H., Clem, John R, & Yang, Wenrong. A nanoscale SQUID operating at high magnetic fields. United States. https://doi.org/10.1088/0957-4484/22/45/455501
Lam, Simon K. H., Clem, John R, and Yang, Wenrong. 2011. "A nanoscale SQUID operating at high magnetic fields". United States. https://doi.org/10.1088/0957-4484/22/45/455501.
@article{osti_1037866,
title = {A nanoscale SQUID operating at high magnetic fields},
author = {Lam, Simon K. H. and Clem, John R and Yang, Wenrong},
abstractNote = {A washer-free Nb nanoSQUID has been developed for measuring magnetization changes from nanoscale objects. The SQUID loop is etched into a 250 nm wide Au/Nb bilayer track and the diameter of the SQUID hole is ~ 70 nm. In the presence of a magnetic field perpendicular to the plane of the SQUID, vortex penetration into the 250 nm wide track can be observed via the critical current–applied field characteristic and the value at which vortex first penetrates is consistent with the theoretical prediction. Upon removing the applied field, the penetrated vortices escape the track and the critical current at zero field is restored.},
doi = {10.1088/0957-4484/22/45/455501},
url = {https://www.osti.gov/biblio/1037866}, journal = {Nanotechnology},
number = 45,
volume = 22,
place = {United States},
year = {Thu Oct 13 00:00:00 EDT 2011},
month = {Thu Oct 13 00:00:00 EDT 2011}
}