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Synthesis and Characterization of Mn-Doped BiFeO_3 Nanoparticles

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Fukumura H., Matsui S., Tonari N., Nakamura T., Hasuike N., Nishio K., Isshiki T., Harima H., Kisoda K.

Acta Physica Polonica A

2009

vol. 116

issue 1

47-50

BiFeO_3 is a multiferroic material showing antiferromagnetic ordering and ferroelectric behavior simultaneously. Here, Mn-doped BiFeO_3 nanoparticles were synthesized up to 10% of Mn composition by a sol-gel process. The samples showed high crystallinity with no secondary phase up to 2% of Mn doping. A phonon peak at 1250 cm^{-1} in undoped BiFeO_3 showed anomalous intensity enhancement in the magnetically ordered phase below T_N = 643 K due to a spin-phonon coupling. This behavior was less pronounced in the Mn-doped samples, suggesting a suppression of magnetic ordering between Fe^{3+} spins by Mn doping.

Micro-Raman Study of BiFeO_3 Thin Films Fabricated by Chemical Solution Deposition Using Different Bi/Fe Ratio Precursors

100%

Nakamura T., Fukumura H., Hasuike N., Harima H., Nakamura Y., Kisoda K., Nakashima S., Okuyama M.

Acta Physica Polonica A

2009

vol. 116

issue 1

72-74

BiFeO_3 thin films were grown by chemical solution deposition using precursors with different elemental ratios, Bi/Fe = 1.1/1.0, 1.0/1.0 and 1.0/1.1. All the samples consisted of two easily distinguishable components of crystalline and amorphous phases. We have found that the electric properties of BiFeO_3 thin films are closely connected to the crystallinity of the films.

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2 Acta Physica Polonica A

2 2009

2 Fukumura H.

2 Harima H.

2 Hasuike N.

2 Kisoda K.

2 Nakamura T.

1 Isshiki T.

1 Matsui S.

1 Nakamura Y.

1 Nakashima S.

1 Nishio K.

1 Okuyama M.

1 Tonari N.

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Synthesis and Characterization of Mn-Doped BiFeO_3 Nanoparticles

Micro-Raman Study of BiFeO_3 Thin Films Fabricated by Chemical Solution Deposition Using Different Bi/Fe Ratio Precursors