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Related Experiment Video

Updated: Jul 2, 2026

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires

A Fabrication Method for Highly Stretchable Conductors with Silver Nanowires

Published on: January 21, 2016

Superconducting silver brazing alloy (silver solder).

J R Thompson¹, J O Thomson

¹Department of Physics and Astronomy, University of Tennessee-Knoxville, Knoxville, TN 37916, USA.

The Review of Scientific Instruments

|October 1, 1978

Summary

This summary is machine-generated.

A silver solder alloy exhibits superconductivity at 96.6 mK, showing a Meissner effect in about a third of its volume. This finding necessitates caution when using this material near sensitive magnetic instruments at very low temperatures.

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Area of Science:

Materials Science
Condensed Matter Physics
Superconductivity

Background:

Superconducting materials are crucial for advanced technologies, including sensitive magnetic measurement devices.
Silver-based alloys are widely used in various applications, but their superconducting properties are less explored.

Purpose of the Study:

To investigate the superconducting properties of a BAg-3 silver brazing alloy.
To determine the critical temperature (Tc) and critical magnetic field (Hc) of the alloy.
To assess the implications of its superconducting behavior for low-temperature applications.

Main Methods:

Observation of superconducting transition using standard low-temperature measurement techniques.
Measurement of critical temperature (Tc) and critical magnetic field (Hc).
Assessment of diamagnetism to confirm the Meissner effect and estimate the superconducting volume fraction.

Main Results:

A superconducting transition was observed in the BAg-3 silver brazing alloy at a critical temperature (Tc) of 96.6 mK.
The critical magnetic field (Hc) was determined to be 4.7 Oe.
Approximately one-third of the sample volume exhibited the Meissner effect, confirmed by associated diamagnetism.

Conclusions:

The BAg-3 silver brazing alloy displays superconducting properties at very low temperatures.
The observed Meissner effect indicates potential limitations for its use in close proximity to sensitive magnetic devices.
Caution is advised when employing this silver solder in cryogenic environments, especially with devices like AC and SQUID magnetometers.