Mixed rare-earth iron garnet (TbY)IG for magnetic field sensors

Abstract
Temperature dependence of sensitivity constants, corresponding to Verdet constant, of dodecahedrally substituted (TbxY1−x)IG crystals grown by a conventional flux method and liquid-phase epitaxy method are studied. By measuring the variation of the sensitivity constant with temperature, it was found that crystals with X=0.19 show a minimum value of ±1% between 300 and 400 K. The temperature dependence of sensitivity constants on Tb concentration was explained by a simple theoretical calculation.