Microstructure and magnetic character of terbium borate glass

Abstract

Microstructure and magnetic character of 30 Tb2O3 · 70 B2O3 glass have been examined by means of high-resolution transmission electron microscopy and magnetization measurements. Although no trace of crystahine phases was observed in the electron diffraction pattern, the transmission electron micrograph revealed that there exist clusters, the size of which is about 1 nm, in the present glass. The magnetization measurements showed that this glass is paramagnetic at room temperature. However, the magnetization is high enough for the glass to adhere to a permanent magnet in the Nd-Fe-B system at room temperature.