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Device and method for detecting force electromagnetic coupling behavior of giant magneto resistive film

A technology of electromagnetic coupling and giant magnetoresistance, applied in the fields of electrical experiments, engineering materials, structural deformation and mechanical experiments

Active Publication Date: 2012-06-20
TSINGHUA UNIV
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Problems solved by technology

However, there are few studies on the force-electromagnetic coupling behavior of giant magnetoresistive thin films, especially the research on the influence of the mechanical properties of giant magnetoresistive thin films on their giant magnetoresistance effect is of great significance in theory and application.

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  • Device and method for detecting force electromagnetic coupling behavior of giant magneto resistive film

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Embodiment Construction

[0038] The specific structure and implementation mode of the present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0039] figure 1 It is a schematic diagram of a detection device for the force-electromagnetic coupling behavior of the giant magnetoresistive material of the present invention. The device includes a magnetic field generator for generating uniform magnetic fields of different intensities, a giant magnetoresistance thin film hysteresis loop measurement optical path, a thin film stress measurement optical path, an optical shock absorption and force loading platform 14 for placing the test piece, and a thin film resistance probe Measuring instrument12.

[0040] The giant magnetoresistive film hysteresis loop measurement optical path includes the first laser 1a, the first aperture-shaped adjustable diaphragm 6a, the polarizing prism 7, the firs...

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Abstract

The invention discloses a device and a method for detecting the force electromagnetic coupling behavior of a giant magneto resistive film, and belongs to the technical field of engineering materials, structural deformation, mechanics experiment and electrical experiment. The device comprises a magnetic field generator, a giant magneto resistive film hysteresis loop measurement optical path, a film stress measurement optical path, and a film resistance probe tester. The giant magneto resistive film hysteresis loop measurement optical path comprises a laser, diaphragms, reflectors, a polarizer, an analyzer, a lens and a photoelectric detector; and the film stress measurement optical path comprises a laser, a spatial filter, a calibrator, reflectors, and a charge couple device (CCD) camera. A uniform magnetic field is provided by the magnetic field generator; the hysteresis loop is measured according to a magneto-optic Kerr effect; curvature of the surface of the film is measured by a multi-beam optical stress sensitivity technology; the stress of the film is obtained according to the relation expression of the curvature and the stress; the resistivity of a film material is measured by the film resistance probe tester; and coupling relational expressions of the resistance of the giant magneto resistive film and the magnetic induction density and stress of the film can be obtained finally.

Description

technical field [0001] The invention relates to a detection device and method for the force-electromagnetic coupling behavior of a giant magnetoresistive thin film, and belongs to the technical fields of engineering materials, structural deformation, mechanical experiments, and electrical experiments. Background technique [0002] Giant magnetoresistance thin film material is a very important functional material in microelectronics and information technology. It has a variety of unique physical properties, such as giant magnetoresistance effect, magnetic anisotropy, magneto-optical Kerr effect, magnetostriction effect, etc. , especially utilizing the giant magnetoresistance effect of the giant magnetoresistance film, it has been widely studied and applied in many aspects of modern technology, especially magnetic storage media. As an important functional film, giant magnetoresistive thin films are often in a multi-field coupling environment when they work, and their physical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/14G01L1/24G01R27/08
Inventor 冯雪张长兴董雪林
Owner TSINGHUA UNIV
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