巨南
幼苗
共回答了16个问题采纳率:100% 举报
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 the nano-crystalline thin bring that material thickness at the interval, GMI effect increases with increasing thickness. This may be because when the films are thin, the film stress caused by the easy-axis oriented thin films deviated from the horizontal film, making films in the skin effect is weak, so weak GMI effect.
Experiment six: Materials selected for the GMI effect. Through the selection of materials found on the GMI effect has the following effects:
Select a different ⑴ Materials, the largest GMI effect of the drive current corresponding to the frequency of different samples of the best frequency of 1MHz, the best frequency for Samples 2MHz.
Select a different ⑵ Materials, the maximum GMI effect of pulsed magnetic fields of different treatment parameters. Samples for the magnetic field strength 350Oe, pulse frequency of 30Hz when, GMI effect of the largest. Samples for the magnetic field strength 350Oe, pulse frequency of 35Hz when, GMI effect of the largest.
⑶ the pulsed magnetic field at the same treatment conditions, the length, width, thickness of different materials are the same, the same drive current at the maximum GMI effect different. In this paper, the pulsed magnetic field treatment in the same sample under the conditions of the GMI effect is greater than the GMI effect of the sample.
1年前
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