Shape-controlled synthesis of high-purity CrO2 under HTHP

Shape-controlled synthesis of high-purity CrO2 under HTHP
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高温高压下形状控制合成高纯 CrO2

DOI:
10.1016/j.matlet.2009.12.011
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发表时间:
2010-03
期刊:
影响因子:
3
通讯作者:
Mao, Ho-Kwang
Mao, Ho-Kwang
中科院分区:
材料科学3区
文献类型:
--
作者:
Zhao, Qiang;Fan, Yinbo;Wen, Gehui;Liu, Zhigang;Ma, Hongan;Jia, Xiaopeng;Zou, Guangtian;Mao, Ho-Kwang

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在高温(400°C–600°C)和高压(1GPa–5GPa)条件下制备高纯CrO2粉末。 CrO2粉末的形状、尺寸和晶界密度可以通过简单地改变温度和压力等实验条件来调节。还研究了不同条件下制备的CrO2粉末的磁性能。样品的饱和磁化强度与报道的最佳值一致。具有受控形貌的 CrO2 粉末的合成应该引起隧道磁阻研究的兴趣。
High-purity CrO2powders were prepared under high temperature (400°C–600°C) and high pressure (1GPa–5GPa) conditions. The shape, size and the grain boundary density of the CrO2powders can be tuned via simply changing the experiment conditions, such as temperature and pressure. Magnetic properties of the CrO2powders prepared under different conditions were investigated also. The saturation magnetizations of the samples are consistent with the best value ever reported. The synthesis of CrO2powders with controlled morphology should be of interest in tunneling magnetoresistance research.
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