Temperature Compensation in the '2:17' type magnets

Compensation for the temperature dependence of magnetic flux has been investigated in the '2:17' type permanent magnet alloys. A computer assisted composition selection procedure was adapted and one of the identified compositions, Sm
1.18
Dy
.81
Gd
.01
Co
9.76
Fe
4.19
Cu
.83
Zr
.34
, was processed into magnets. The measured temperature coefficients correlated satisfactorily with the prediction. Dysprosium was found to be a better substituent for Sm than either Gd or Er in providing temperature coefficient of linearity.