TY - JOUR
T1 - Effect of titanium ion substitution in the barium hexaferrite studied by Mössbauer spectroscopy and X-ray diffraction
AU - Quiroz, Pamela
AU - Halbedel, Bernd
AU - Bustamante, Angel
AU - González, Juan C.
PY - 2011/11/1
Y1 - 2011/11/1
N2 - 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. © 2011 Springer Science+Business Media B.V.
AB - 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. © 2011 Springer Science+Business Media B.V.
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U2 - 10.1007/s10751-011-0361-1
DO - 10.1007/s10751-011-0361-1
M3 - Article
SN - 0304-3843
SP - 97
EP - 106
JO - Hyperfine Interactions
JF - Hyperfine Interactions
ER -