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Title: Size effect on the structural and magnetic properties of nanosized perovskite LaFeO 3 prepared by different methods
Authors: Nguyen, Thi Thuy
Dang, Le Minh
Keywords: Coprecipitation method;Ferromagnetic behaviors;Langevin functions;Room temperature;Transmission electron microscopy;X ray diffraction;Magnetic properties;Differential scanning calorimetry
Issue Date: 2012
Publisher: H. : ĐHQGHN
Abstract: Nanosized LaFeOmaterial was prepared by 3 methods: high energy milling, citrate gel, and coprecipitation. The X-ray diffraction (XRD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) show that the orthorhombic LaFeOphase was well formed at a low sintering temperature of 500°C in the citrate-gel and co-precipitation methods. Scanning electron microscope (SEM) and transmission electron microscope (TEM) observations indicate that the particle size of the LaFeOpowder varies from 10 nm to 50 nm depending on the preparation method. The magnetic properties through magnetization versus temperature M (T) and magnetization verses magnetic field M (H) characteristics show that the nano-LaFeOexhibits a weak ferromagnetic behavior in the room temperature, and the M (H) curves are well fitted by Langevin functions.
Description: Advances in Materials Science and Engineering 2012,380306
Appears in Collections:Bài báo của ĐHQGHN trong Scopus

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