通过简单的水热反应,分别在无外加诱导磁场和有外加磁场条件下合成了不同结构的磁性Co纳米材料.用XRD、SEM、TEM和PPMS分别表征了样品的晶相、形貌和磁性能.结果显示,无磁场下的样品(ZF样品)为单分散Co纳米球,而磁场下的样品(AF样品)为Co纳米球组装形成的一维链状结构,二者有相近的饱和磁化强度(分别为30.98、31.96A·m2/kg),但其矫顽力和剩磁比却明显不同(ZF样品:901.87A/m、0.096;AF样品:8436.8A/m,0.047),认为这主要磁场诱导形成特殊一维链状结构的形状各向异性造成的.
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