Magnetic properties of ZnO-TeO2-Fe2O3 glasses

The electron spin resonance (ESR) and magnetization measurements were carried out on (20−x)ZnO-xFe2O3-80TeO2 (x=5-20 mol%) glasses. The ESR signal consists of a broad resonance at g≈2.0 ascribed to antiferromagnetic interactions between the Fe2+ and Fe3+ ions. The linewidth (ΔHpp) and the intensity (J) of this signal increases with increase in Fe2O3 content. The magnetization measurements indicate the existence of short range antiferromagnetic (AFM) interactions between Fe ions which increases with increase in Fe2O3 content in these glasses.