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来源:百度知道 编辑:UC知道 时间:2024/09/25 22:20:06
实验五:GMI效应与样品厚度的关系。通过实验发现对 纳米晶薄带来说,材料厚度在 到 区间,GMI效应随厚度的增加而增大。这可能是由于当 薄膜较薄时,薄膜中的应力造成薄膜的易轴取向偏离薄膜的横向,使得薄膜中趋肤效应较弱,故GMI效应较弱。
实验六:材料选取对GMI效应的影响。通过实验发现材料的选取对GMI效应有以下几点影响:
⑴材料选取不同,最大GMI效应所对应的驱动电流频率不同, 样品的最佳频率为1MHz, 样品的最佳频率为2MHz。
⑵材料选取不同,获得最大GMI效应的脉冲磁场处理参数不同。 样品磁场强度为350Oe,脉冲频率为30Hz时,GMI效应最大。 样品磁场强度为350Oe,脉冲频率为35Hz时,GMI效应最大。
⑶在相同的脉冲磁场处理条件下,长度、宽度、厚度均相同的不同材料,在相同驱动电流下的最大GMI效应不同。本文中,在相同脉冲磁场处理条件下 样品的GMI效应要大于 样品的GMI效应。
Four experiments: GMI effect and the relationship between sample resistivity. Found through experiments that the smaller the resistivity of the conductive properties of the sample the better the performance of Samples from the GMI effect is significant. This is because if the material is very good and conductive properties of soft magnetic materials are also good, that is, the larger conductivity (resistivity less), then a smaller magnetic field can cause large changes in impedance, it is observed to the larger GMI effect. In addition, the experiment also found that nano-magnetic amorphous alloy sample after crystallization behavior and resistance of non-conventional Jingjing different acts of resistance, at a certain magnetic field strength, the emergence of a very small resistance value, the anomalous resistivity are nano - crystal result of quantum size effect.
Five experiments: GMI effect relationship between the thickness of the sample. Found through experiments on