Tunable Morphology and Magnetic Properties of Bi2Fe4O9 Nanocrystal Synthesized by Hydrothermal Method

Authors

Yi Du, University of WollongongFollow
Zhenxiang Cheng, University of WollongongFollow
S X. Dou, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow

RIS ID

42855

Publication Details

Du, Y., Cheng, Z., Dou, S. Wang, X. (2011). Tunable Morphology and Magnetic Properties of Bi₂Fe₄O₉ Nanocrystal Synthesized by Hydrothermal Method. Journal of Nanoscience and Nanotechnology, 11 (3), 2691-2695.

Abstract

Bi₂Fe₄O₉ nano and micron powders have been synthesized by a hydrothermal method. The asobtained samples are pure phase and crystallize in the orthorhombic structure. Diverse particle morphologies, including nanoplates, nanospheres, microcubes, and microcylinders, are obtained under different synthesis conditions. The solvent N,N-Dimethylformamide (DMF), together with the mineralisers NaOH and NH₄OH, are found to be the key factors for the formation of the particles with their diverse morphologies and sizes. The magnetization dependence of temperature (M-T), observed in a field of 1000 Oe from 10 to 340 K, and M-H loops measured at 10 K indicate that the Bi₂Fe₄O₉ particles are paramagnetic at room temperature and undergo an antiferromagnetic transition at a Néel temperature (T_N) of 250 K.