A device for testing complex magnetic permeability of thin films by short-circuit microstrip line method

Abstract

The invention relates to a device for testing the complex magnetic permeability of a film by a short-circuit microstrip line method, which belongs to the technical field of magnetic material testing. Including the base, the outer coil, the inner coil, the loading platform, the short-circuit microstrip line fixture, the outer coil and the inner coil are coaxial hollow cylindrical coils, the inner coil is located inside the outer coil, the outer coil is set on the base, and the loading platform Set on the inner side of the inner coil, the short-circuit microstrip line fixture is placed on the loading platform, and the central axis of the outer coil and the inner coil, as well as the loading platform and the horizontal plane have an included angle α. The device of the present invention forms a central magnetic field through two coaxial hollow cylindrical coils, without using an electromagnet, has small volume, light weight, low power consumption, and a large central magnetic field can be realized with fewer coils, and the cost is low; the present invention The device does not need to replace the entire test system when the coil is damaged, but only needs to replace the corresponding part of the coil, which is convenient to use and has low working voltage.

Description

technical field [0001] The invention belongs to the technical field of magnetic material testing, and in particular relates to a device for testing complex magnetic permeability of thin films by using a short-circuit microstrip line method. Background technique [0002] Microwave permeability is a sign of the response ability of magnetic moments in magnetic materials to microwave signals, and it is generally a complex number; accurate measurement of complex permeability of materials is of great significance for the analysis and application of high-frequency characteristics. While measuring the magnetic permeability, it is necessary to apply an external magnetic field to the test sample, otherwise the film will be in an indeterminate non-magnetic or residual magnetic state, which will hinder the magnetic moment arrangement and mechanism analysis in the film, and the changing external field can also change The positions of the corresponding mechanistic resonance peaks, thereby...

AI Technical Summary

Problems solved by technology

The short-circuit microstrip line method is a commonly used method for testing the complex magnetic permeability of thin films. Usually, two large electromagnets are used to load both ends of the fixture during the test. The electromagnet has high power consumption, high cost, and large volume, which is inconvenient move

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