Preparation and Magnetic Property of La_(0.7)Sr_(0.3)MnO_3 Nanorod by Combination Sol-Gel with Molten Salt |
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Authors: | QI Shu-yan FENG Jing XU Xiao-dong WANG Jing-ping HOU Xiang-yu ZHANG Mi-lin Key Laboratory of Superlight Materials & Surface Technology of Ministry of Education Harbin Engineering University Harbin P R China |
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Institution: | QI Shu-yan,FENG Jing,XU Xiao-dong,WANG Jing-ping,HOU Xiang-yu , ZHANG Mi-lin Key Laboratory of Superlight Materials & Surface Technology of Ministry of Education,Harbin Engineering University,Harbin 150001,P. R. China |
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Abstract: | La0.7Sr0.3MnO3(LSMO) nanorods were synthesized by a method combining sol-gel with molten salts at 950 ℃ for 10 h,which employed KCl+NaCl(mass ratio 4:1) as eutectic molten salts.The morphologies and magnetic properties of the resulting LSMO nanorods were investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and vibrating sample magnetometer(VSM) measurements.It was found that the obtained perovskite manganite LSMO was a uniform nanorod with a diameter of about 50 nm and a length of longer than 500 nm.The Curie temperature(Tc) of the LSMO nanorod used here was 262 K,much lower than that of bulky single crystal LSMO(360 K).The low Curie temperature might be a result of the great disorder near the grain boundary,which could be observed clearly from the TEM picture. |
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Keywords: | Molten salt synthesis Sol-gel processes Perovskite Nanostructured materials |
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