Magnetic Moment Versus Temperature Curves of Rare-Earth Iron Garnets

摘要

Molecular-field coefficients of the heavy rare-earth iron garnets (Tb, Dy, Ho, Er, Tm, and YbIG) have been determined by fitting calculated and experimental magnetic-moment-vs-temperature curves. For these compositions, spin canting appears to cause a significant reduction in the net moment of the c sublattice. The results are compared with values of coefficients derived from paramagnetic susceptibility measurements and with other values determined without taking into account c-sublattice canting. The capability of the computer program has been expended to permit magnetization-temperature calculations of compositions that contain as many as three different rare earth ions in the c sublattice. (Author)