Low-frequency complex magnetic conductivity testing device and method for soft magnetic film
A complex magnetic permeability, soft magnetic thin film technology, used in magnetic properties measurement, permeability measurement, etc.
Active Publication Date: 2021-08-13
BEIHANG UNIV
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Problems solved by technology
The complex permeability of the soft magnetic film is the key parameter to calculate the hysteresis loss noise under the low-frequency signal, but the existing film complex permeability test devices are all aimed at the complex permeability test under the high-frequency signal, which cannot satisfy above requirements
The traditional method of measuring low-frequency complex permeability is used to measure the solid annular magnetic material. For thin soft magnetic films, there is currently no method for measurement and related calculations.
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[0022] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the specific implementation process and accompanying drawings. The inside and outside of the present invention are relative to the central axis of rotation of the annular test body 1 , and the inner is close to the central axis of rotation, and the outer is farther from the central axis of rotation.
[0023] A low-frequency complex permeability testing device for soft magnetic films, such as figure 1 As shown, it includes an annular test body 1 , a coil 2 and an LCR meter 3 , the coil 2 is evenly wound on the outer surface of the annular test body 1 , and the terminals of the coil 2 are connected to the LCR meter 3 . Such as Figure 2-3 As shown, the annular test body 1 is a circular structure with a busbar, comprising a coaxial soft magnetic film 11, a film holder 12 and an external snap ring 13; the film holder 12 and the...
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Abstract
According to a low-frequency complex magnetic conductivity testing device and method for a soft magnetic film, a rotating body type annular testing body with a circular bus is designed, the soft magnetic film is fixed in the annular testing body, then coils are evenly wound on the outer surface of the overall structure of the annular testing body, the wiring ends of the coils are connected with an LCR meter, the equivalent resistance and the equivalent inductance of the annular testing body containing the soft magnetic film under the low-frequency signal are tested, so that the low-frequency complex magnetic conductivity of the soft magnetic film is obtained, and the purpose of calculating and evaluating the hysteresis loss noise of the soft magnetic film is achieved.
Description
technical field [0001] The invention relates to a low-frequency complex magnetic permeability testing device and method for soft magnetic thin films, belonging to the technical field of magnetic material permeability measurement. Background technique [0002] The atomic spin magnetic field measurement system based on spin-exchange relaxation-free (Spin-Exchange Relaxation-Free, SERF) technology has ultra-high sensitivity and has broad application prospects in frontier scientific research, basic physics research, and biomedicine. The ultra-high-sensitivity magnetic field measurement device based on SERF atomic spin requires a stable magnetic field environment. Traditional magnetic materials are generally used for magnetic shielding to isolate the interference of the geomagnetic field and the environmental magnetic field. However, the hysteresis loss noise of traditional magnetic materials is very large, which has a great impact on the measurement sensitivity. Soft magnetic f...
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Login to View More IPC IPC(8): G01R33/12
CPCG01R33/1223
Inventor 陆吉玺高亚楠马丹跃王坤李思然蒋硕孙畅
Owner BEIHANG UNIV