Cryogen-free variable temperature scanning SQUID microscope
Abstract
Scanning Superconducting QUantum Interference Device (SQUID) microscopy is a powerful tool for imaging local magnetic properties of materials and devices, but it requires a low-vibration cryogenic environment, traditionally achieved by thermal contact with a bath of liquid helium or the mixing chamber of a “wet” dilution refrigerator. We mount a SQUID microscope on the 3 K plate of a Bluefors cryocooler and characterize its vibration spectrum by measuring SQUID noise in a region of sharp flux gradient. By implementing passive vibration isolation, we reduce relative sensor-sample vibrations to 20 nm in-plane and 15 nm out-of-plane. A variable-temperature sample stage that is thermally isolated from the SQUID sensor enables measurement at sample temperatures from 2.8 K to 110 K. We demonstrate these advances by imaging inhomogeneous diamagnetic susceptibility and vortex pinning in optimally-doped YBCO above 90 K.
- Authors:
-
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Dept. of Applied Physics
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Dept. of Applied Physics
- Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Science (SIMES); Stanford Univ., CA (United States). Dept. of Applied Physics; Stanford Univ., CA (United States). Geballe Lab. for Advanced Materials
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1523846
- Alternate Identifier(s):
- OSTI ID: 1529170
- Grant/Contract Number:
- AC02-76SF00515; AC02- 76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 90; Journal Issue: 6; Journal ID: ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Bishop-Van Horn, Logan, Cui, Zheng, Kirtley, John R., and Moler, Kathryn A. Cryogen-free variable temperature scanning SQUID microscope. United States: N. p., 2019.
Web. doi:10.1063/1.5085008.
Bishop-Van Horn, Logan, Cui, Zheng, Kirtley, John R., & Moler, Kathryn A. Cryogen-free variable temperature scanning SQUID microscope. United States. https://doi.org/10.1063/1.5085008
Bishop-Van Horn, Logan, Cui, Zheng, Kirtley, John R., and Moler, Kathryn A. Sat .
"Cryogen-free variable temperature scanning SQUID microscope". United States. https://doi.org/10.1063/1.5085008. https://www.osti.gov/servlets/purl/1523846.
@article{osti_1523846,
title = {Cryogen-free variable temperature scanning SQUID microscope},
author = {Bishop-Van Horn, Logan and Cui, Zheng and Kirtley, John R. and Moler, Kathryn A.},
abstractNote = {Scanning Superconducting QUantum Interference Device (SQUID) microscopy is a powerful tool for imaging local magnetic properties of materials and devices, but it requires a low-vibration cryogenic environment, traditionally achieved by thermal contact with a bath of liquid helium or the mixing chamber of a “wet” dilution refrigerator. We mount a SQUID microscope on the 3 K plate of a Bluefors cryocooler and characterize its vibration spectrum by measuring SQUID noise in a region of sharp flux gradient. By implementing passive vibration isolation, we reduce relative sensor-sample vibrations to 20 nm in-plane and 15 nm out-of-plane. A variable-temperature sample stage that is thermally isolated from the SQUID sensor enables measurement at sample temperatures from 2.8 K to 110 K. We demonstrate these advances by imaging inhomogeneous diamagnetic susceptibility and vortex pinning in optimally-doped YBCO above 90 K.},
doi = {10.1063/1.5085008},
journal = {Review of Scientific Instruments},
number = 6,
volume = 90,
place = {United States},
year = {Sat Jun 01 00:00:00 EDT 2019},
month = {Sat Jun 01 00:00:00 EDT 2019}
}
Web of Science
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Works referencing / citing this record:
Isolation solution for extreme environmental vibrations for quantum-enabling cryogenic setups installed on raised frames
journal, August 2019
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