Effect of gadolinium ions on the structure and magnetic properties of zinc-borate glasses and glass ceramics

摘要: X-ray diffraction (XRD), electron paramagnetic resonance (EPR), and magnetic susceptibility measurements have been employed to investigate the samples from (Gd2O3)x·(B2O3)(60−x)·(ZnO)40 (0 ≤ x 20 mol%) system. The XRD pattern for prepared shows that vitreous phase is present only 15 mol%. For containing mol% Gd2O3 presence of a unique crystalline phase, GdBO3, embedded in matrix was evidenced. In this case patterns show nanometer sized crystals (64 nm) glassy matrix. EPR spectra studied exhibit three important features with effective g-values ≈6, 2.8, 2.0 weaker feature at g ≈ 4.8. low contents (x 1 Gd3+ ions are not as isolated species but also coupled through antiferromagnetic exchange interactions.