Magnetic properties of xCeO2(0.90Na2B4O7·0.10PbO) glasses

Glasses containing rare earth ions are of great interest due to their interesting structural, spectroscopic and magnetic properties. We studied magnetic behaviour of xCeO2(0.90Na2B4O7·0.10PbO) glasses where x=0.01-0.15. The samples were obtained by melting appropriate mixtures of the constitutive oxides at 1300 deg. C for 10 minutes. The melts were rapidly quenched by pouring on a stainless steel plate. Magnetic susceptibility measurements were performed using a Faraday type susceptibility balance in the 80-300 K temperature range. Magnetic data suggest a modified Curie - Weiss type behaviour and may be described using the formula χ=χo+C/(T - Θp) where χo is the temperature independent magnetic susceptibility, C is the Curie constant, T is the temperature and Θp is the paramagnetic Curie temperature. The mentioned magnetic parameters were obtained by fitting the above formula. The C values obtained by this procedure were used to compute the amounts of Ce3+ and Ce4+ ions in the samples. (authors)