Abstract
The relationship of the magnetization of Nb‐25% Zr superconducting alloy and the magnetic field of a solenoid constructed of this material is discussed. Measurements of the magnetic field as a function of current, induced magnetic moment, history‐dependent remanent moment, and other related properties are described. An approximate method of computing the magnitudes of these effects is discussed and the results are shown to agree with measurements. The coil critical current Ic is related to the short sample Ic, and the discrepancy is discussed in terms of the magnetization of Nb‐Zr.