ScienceAsia 29 (2003): 051-055 |doi: 10.2306/scienceasia1513-1874.2003.29.051

Boron Site Preference in
B-Doped Barium Hexaferrite

Sirikanjana Thongmee^a, Pongtip Winotai^b, and I Ming Tang^c,d,*

ABSTRACT: Mossbauer studies were conducted on boron-doped barium ferrites BaFe_12-xB_xO₁₉ ( x = 0, 0.1, 0.2, 0.3, 0.4 and 0.6 ) with special attention paid to the behavior of the line widths in the Mossbauer sextets. Assuming that the broadening of the line widths in the various sextets is due to increases in the fluctuations in the hyperfine field ( acting on an Fe ion in a given site ) caused by the introduction of the B ions into the neighboring Fe sites, the observed broadening of the lines belonging to the different sextets indicated that the B ions are entering into the 4f_iv sites, as proposed by Ram ( J Magn Magn Mat 82, 129 (1989)) based on the saturation magnetization measurements.

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a Department of Social & Applied Science, College of Industrial Technology, King Mongkut’s Institute of Technology North Bangkok 10800, Thailand.
b Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
c Department of Physics and Center for Nanoscience, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
d Institute of Science & Technology for Research & Development, Mahidol Unversity, Nakhon Pathom 71730, Thailand.

* Corresponding author, Email: scimt@mahidol.ac.th

Received 26 Mar 2002, Accepted 28 Aug 2002