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written by Asma Khalid, Rabiya Salman, and Muhammad Sabieh Anwar
published by the LUMS School of Science and Engineering
Superconducting Quantum Interference Devices (SQUIDs) are sensitive probes that can detect small changes in the magnetic field. They take advantage of two important properties of superconductors, namely flux quantization and the Josephson effect. Furthermore, SQUIDs demonstrate quantum effects on the macroscopic scale, such as macroscopic wavefunctions, quantum interference and quantum mechanical tunneling. SQUID is a commercially available high temperature superconducting (HTS) DC SQUID magnetometer that will be used for our prototypical experiments.

The objectives of this experiment are:

1. study the basic principles underlying SQUID applications,
2. observe zero resistance of superconductors and examine the superconducting phase transition,
3. observe the DC Josephson effect,
4. observe the periodically varying critical current in the resistive mode of the SQUID,
5. learn about the detection of extremely small magnetic fields by converting them into voltages and using a feedback loop,
6. measure the electrical characteristics of SQUID Josephson junctions and
7. build an ac/dc nano-voltmeter.
Subjects Lab Level Resource Types
Electricity & Magnetism
- Magnetic Materials
Quantum Physics
- Quantum Experiments
Thermo & Stat Mech
- Thermal Properties of Matter
= Low Temperatures
- Advanced Undergraduate
- Instructional Material
= Laboratory
= Student Guide
Material Category Formats Ratings
- Lab Manual
- application/pdf
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Safety Warnings
Advanced Labs Terms of Use Disclaimer Protective Clothing Must be Worn   Protective Footwear Must be Worn   Safety Gloves Must be worn   Low Temperature  


Format:
application/pdf
Access Rights:
Free access
Restriction:
© 2010 LUMS School of Science and Engineering, Pakistan
Keywords:
Critical current, Flux quantization, Flux trapping, Josephson Junctions, Meissner eff, Phase order parameter, Screening current, Superconducting ring, Superconductivity
Record Creator:
Metadata instance created February 12, 2012 by Muhammad Sabieh Anwar
Record Updated:
June 3, 2012 by Lyle Barbato
Last Update
when Cataloged:
April 6, 2010
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Record Link
AIP Format
A. Khalid, R. Salman, and M. Anwar, (LUMS School of Science and Engineering, Pakistan, Lahore Cantt, 2010), WWW Document, (http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11712&DocID=2592).
AJP/PRST-PER
A. Khalid, R. Salman, and M. Anwar, Superconducting Quantum Interference Devices (SQUIDs) (LUMS School of Science and Engineering, Pakistan, Lahore Cantt, 2010), <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11712&DocID=2592>.
APA Format
Khalid, A., Salman, R., & Anwar, M. (2010, April 6). Superconducting Quantum Interference Devices (SQUIDs). Retrieved April 17, 2014, from LUMS School of Science and Engineering, Pakistan: http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11712&DocID=2592
Chicago Format
Khalid, A, R. Salman, and M. Anwar. Superconducting Quantum Interference Devices (SQUIDs). Lahore Cantt: LUMS School of Science and Engineering, Pakistan, April 6, 2010. http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11712&DocID=2592 (accessed 17 April 2014).
MLA Format
Khalid, Asma, Rabiya Salman, and Muhammad Sabieh Anwar. Superconducting Quantum Interference Devices (SQUIDs). Lahore Cantt: LUMS School of Science and Engineering, Pakistan, 2010. 6 Apr. 2010. 17 Apr. 2014 <http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11712&DocID=2592>.
BibTeX Export Format
@misc{ Author = "Asma Khalid and Rabiya Salman and Muhammad Sabieh Anwar", Title = {Superconducting Quantum Interference Devices (SQUIDs)}, Publisher = {LUMS School of Science and Engineering, Pakistan}, Volume = {2014}, Number = {17 April 2014}, Month = {April 6, 2010}, Year = {2010} }
Refer Export Format

%A Asma Khalid
%A Rabiya Salman
%A Muhammad Sabieh Anwar
%T Superconducting Quantum Interference Devices (SQUIDs)
%D April 6, 2010
%I LUMS School of Science and Engineering, Pakistan
%C Lahore Cantt
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11712&DocID=2592
%O application/pdf

EndNote Export Format

%0 Electronic Source
%A Khalid, Asma
%A Salman, Rabiya
%A Anwar, Muhammad Sabieh
%D April 6, 2010
%T Superconducting Quantum Interference Devices (SQUIDs)
%I LUMS School of Science and Engineering, Pakistan
%V 2014
%N 17 April 2014
%8 April 6, 2010
%9 application/pdf
%U http://www.compadre.org/Repository/document/ServeFile.cfm?ID=11712&DocID=2592


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