Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Magnetization and magnetoresistance of common alloy wires used in cryogenic instrumentation



Mike Abrecht, Andrew Adare, John (Jack) W. Ekin


We present magnetization and magnetoresistance data at liquid-helium and liquid-nitrogen temperatures for wire materials commonly used for instrumentation wiring of specimens, sensors, and heaters in cryogenic probes. The magnetic susceptibilities in Systeme International units at 4.2 K were found to be: Manganin 1.25x10-2, Nichrome 5.6x10-3, and phosphor bronze -3.3x10-5, indicating that phosphor bronze is the most suitable for high-field applications. We also show the ferromagnetic hysteresis loop of Constantan wire at liquid-helium temperature. The magnetoresistance of these four wires was relatively small: the changes in resistance at 4 K due to a 10 T transverse magnetic field are -2.56% for Constantan, -2.83% for Manganin, +0.69% for Nichrome, and +4.5% for phosphor bronze, compared to about +188% for a typical copper wire under the same conditions.
Review of Scientific Instruments


Constantan, copper alloys, magnetization, magnetoresistance, Manganin, Nichrome, phosphor bronze


Abrecht, M. , Adare, A. and Ekin, J. (2007), Magnetization and magnetoresistance of common alloy wires used in cryogenic instrumentation, Review of Scientific Instruments, [online], (Accessed February 27, 2024)
Created April 15, 2007, Updated October 12, 2021