1State Key Laboratory of New Ceramics and Fine Processing, Department of Chemistry and Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 2Department of Physics, Peking University, Beijing 100871
Preparation, Morphology Transformation and Magnetic Behavior of Co3O4 Nano-Leaves
1State Key Laboratory of New Ceramics and Fine Processing, Department of Chemistry and Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 2Department of Physics, Peking University, Beijing 100871
摘要A series of cubic phase Co3O4 nano−leaves were prepared via a combined approach of solution reaction and calcination. According to x-ray diffraction and electron microscopy, we find that the Co3O4 grain size increases with calcination temperature. This can induce many gaps in the products. M–T and M–H magnetization measurements reveal the typical antiferromagnetic behavior of nano−leaves. The effective moments of the samples prepared at 300, 400 and 500°C are 5.6, 5.8 and 5.7 μB per formula unit (FU), respectively, larger than the bulk value of 4.14 μB/FU.
Abstract：A series of cubic phase Co3O4 nano−leaves were prepared via a combined approach of solution reaction and calcination. According to x-ray diffraction and electron microscopy, we find that the Co3O4 grain size increases with calcination temperature. This can induce many gaps in the products. M–T and M–H magnetization measurements reveal the typical antiferromagnetic behavior of nano−leaves. The effective moments of the samples prepared at 300, 400 and 500°C are 5.6, 5.8 and 5.7 μB per formula unit (FU), respectively, larger than the bulk value of 4.14 μB/FU.
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2010, Vol. 27 
