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Effect of Gadolinium on the Structure and Magnetic Properties of Glass and Glass–Ceramic Sillenites
Author(s) -
Simon Simion,
Udvar Alexandru D.
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03783.x
Subject(s) - electron paramagnetic resonance , gadolinium , materials science , magnetic susceptibility , ceramic , antiferromagnetism , ion , glass ceramic , paramagnetism , analytical chemistry (journal) , quenching (fluorescence) , mineralogy , nuclear magnetic resonance , composite material , crystallography , chemistry , metallurgy , condensed matter physics , optics , fluorescence , physics , organic chemistry , chromatography
Glass samples belonging to x Gd 2 O 3 ·(1− x )[0.857Bi 2 O 3 ·0.143GeO 2 ] system, with 0.005≤ x ≤0.1, have been prepared by the rapid quenching method. Glass–ceramics were obtained after heat treatment of the as‐prepared glasses at 600°C for 24 h. All samples have been structurally characterized by X‐ray diffraction and electron paramagnetic resonance (EPR) spectroscopy. All as‐prepared samples are noncrystalline. The glass–ceramics contain different bismuthate crystalline phases, Bi 12 GeO 20 , BiLa type, and Bi 24 GeO 38 , depending on the gadolinium content in the glassy sample. The magnetic properties have been investigated by EPR and magnetic susceptibility measurements. The EPR and magnetic susceptibility data suggest that besides homogeneously distributed Gd 3+ ions, both in the glass and glass–ceramic samples, there are clustered Gd 3+ ions experiencing antiferromagnetic interactions.