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Magnetic properties of a new BaO.Fe2O3.Na2O glass

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
27
Issue
3
Identifiers
DOI: 10.1016/0038-1098(78)90031-5

Abstract

Abstract Homogeneous BaO.Fe 2O 3.Na 2O glass containing 60% Fe 2O 3 is prepared by splat cooling technique. X-ray diffraction reveals the presence of a few small βNaFeO 2 crystallites in a glassy matrix. DTA studies show that βNaFeO 2 cristallizes first and BaFe 12O 19 next. In the temperature range 130K < T < 400K this glass shows Curie-Weiss behaviour with large negative Weiss constant. The magnetic susceptibility measurements below 130K exhibit a broad maximum near 90–110K. Mössbauer study reveals that the glass mainly consists of tetrahedral network of Fe 3+O 4 and a hyperfine structure at low temperature; magnetic ordering temperature estimated is about (125 ± 5)K.

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