Mössbauer study of amorphous BaO−Fe2O3−B2O3 system

Abstract Homogeneous BaO − Fe 2 O 3 − B 2 O 3 glasses containing maximum Fe 2 O 3 content of 63 mol.% are prepared by splat cooling technique. Mossbauer study reveals that the glass mainly consists of tetrahedral network of Fe 3+ O 4 . Mossbauer spectrum of the glass shows a well defined hyperfine structure at low temperatures. Magnetic ordering temperature estimated is about 130 K for the most iron-rich specimen, being much lower than that of the corresponding crystalline phases, BaO;·;Fe 2 O 3 and BaO·;2Fe 2 O 3 . The magnetic structure is suggested to be of a short-range antiferromagnetic ordering.