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首页> 外文期刊>Crystallography reports >A Study of the Morphology and Magnetic Properties of Silicon Whiskers
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A Study of the Morphology and Magnetic Properties of Silicon Whiskers

机译：硅晶须的形貌和磁性研究

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Methods of growing Si whiskers are considered and the results of studying their magnetic susceptibility χ are reported. Silicon whiskers are grown using the method of chemical transport reactions in a closed bromide system. The crystals studied were divided into four groups: (i) crystals 0.1–0.9 μm in diameter, (ii) twinned crystals 1–2 μm in diameter, (iii) needle-like crystals from 5 to 1500 μm in diameter, and (iv) isometric crystals (the latter were not measured). With an increase in diameter, the whiskers of the first group changed their state from paramagnetic to diamagnetic, while the crystals of the third group showed a transition from a diamagnetic to a paramagnetic state. All these crystals show a nonlinear dependence of χ on the strength of an external magnetic field H; the nonlinearity increases with increasing the sample paramagnetism. The susceptibility of twinned samples is diamagnetic and close to the value of for bulk silicon, and the nonlinearity of the dependence χ(H) is insignificant. The measured values of χ of Si whiskers are explained by features of their crystal structure and chemical composition.
机译：考虑了生长硅晶须的方法，并报告了研究其磁化率χ的结果。硅晶须是在封闭的溴化物系统中使用化学传输反应的方法生长的。研究的晶体分为四组：（i）直径为0.1-0.9μm的晶体;（ii）直径为1-2μm的双晶;（iii）直径为5至1500μm的针状晶体;以及（iv ）等距晶体（未测量后者）。随着直径的增加，第一组晶须的状态从顺磁性变为反磁性，而第三组晶体显示出从抗磁性到顺磁性的转变。所有这些晶体都显示出χ对外部磁场强度H的非线性依赖性。非线性随着样品顺磁性的增加而增加。孪晶样品的磁化率是反磁性的，接近于体硅的值，相关性χ（H）的非线性无关紧要。 Si晶须的χ测量值通过其晶体结构和化学组成特征来解释。

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