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Closed Access item Effect of titanium ion substitution in the barium hexaferrite studied by Mössbauer spectroscopy and X-ray diffraction

Authors:Quiroz, Pamela
Halbedel, Bernd
Bustamante, Ángel
González González, Juan Carlos
Keywords:Barium hexaferrite, Mössbauer spectroscopy, Substitution, X-ray diffraction
Issue Date:Nov-2011
Citation:Hyperfine Interactions 202 (1-3): 97-106 (2011)
Abstract:A series of M-type barium hexaferrite has been synthesized in a glass melt by partially substituting the Fe2O3 with TiO2 for investigation of their structure. The glass melt has the basic composition (mol%): 40 BaO + 33 B2O3 + (27-x) Fe2O3 + x TiO2 with x = 0, 3.6, 5.4 and 7.2 mol% TiO2. The substituted ferrites were studied by means of X-ray diffraction, Mössbauer spectroscopy and vibration sample magnetometer. X-ray diffraction studies revealed that not all samples have a single ferritic phase, a small second phase corresponding to BaTi6O13 was also observed to form. The Mössbauer spectra changed from magnetically ordered (x = 0) to magnetically ordered with strong line broadening. Moreover, the broadening increases with TiO2 content. The Mössbauer parameters suggested that Ti4 +  occupies the 2a and 12k crystal sites, and the Ti4 +  substitution on the 2b and 4f2 site also occurs at high melt dopings. Therefore, coercivity and saturation magnetization decreased
Description:10 pages
Publisher version (URL):http://dx.doi.org/10.1007/s10751-011-0361-1
E-ISSNmetadata.dc.identifier.doi = DOI:1572-9540
Appears in Collections:(ICMS) Artículos

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