High-pressure sample testing table used for measurement of magneto-optical Kerr effect

Abstract

The invention relates to the field of high-pressure physical experiments and material physical property measurement, in particular to a high-pressure sample testing table used for measurement of the magneto-optical Kerr effect. Buttress threads specially designed are arranged on the inner side surfaces of sleeves and the outer side surfaces of displacement tubes respectively, and buttress threadsare adopted by the mobile structures of pressing devices used for pressing tungsten carbide anvil cells, so that thermodynamic deformation of optical fibers and the pressing devices of the anvil cellsis relatively consistent in low-temperature environments, and then optical path adjusting is more precise; a conducting glass electrode board with thickness of 100 micrometers is made from indium tinoxide, and the surface of the conducting glass electrode board is coated with a silylene coating; a sample is located at the center of a teflon ring, the outer ring of the teflon ring is sleeved witha stainless steel ring, the outer ring of the stainless steel ring is sleeved with an aluminum gasket composed of an upper portion and a lower portion, axial through holes are formed in the stainlesssteel ring and the teflon ring, a copper thread is placed between the upper portion and the lower portion of the aluminum gasket, a gold thread penetrates the axial through holes of the stainless steel ring and the teflon ring, one end of the gold thread is connected with the sample, the other end of the gold thread is connected with the copper thread, and particles supporting the gold thread arearranged in the area between the teflon ring and the sample.

Description

technical field [0001] The invention relates to the fields of high-pressure physical experiment technology and material property measurement, and is a high-voltage sample test bench for magneto-optical Kerr effect measurement, which can reduce the fragmentation rate of sample films, is suitable for extremely low temperatures, and has low device cost. Background technique [0002] The anvil is currently the only scientific experimental device that can generate a static pressure of more than one million atmospheres. It is irreplaceable in high-pressure scientific research. The high-hardness material squeezes the sample mechanically to generate a high-pressure environment. A metal gasket with a sample hole pre-processed is placed between the extrusion surfaces formed by the two table tops, and the sample is placed in the sample hole. During the experiment, the pressure on the sample needs to be monitored. At present, the general pressure test method usually uses the method of r...

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Problems solved by technology

[0004] The disadvantage of the prior art is that in the method of measuring pressure by fluorescence spectroscopy in a non-atmospheric environment or a low temperature environment, an optical fiber is required to introduce light into the pressure chamber, and to couple the optical fiber to the sample pressure chamber, so that the optical fiber can efficiently transmit and It is more difficult to collect light; in the prior art, a larger diamond is usually used as an anvil, and tungsten carbide is used as a support table material, and diamond is expensive, while tungsten carbide is magnetic and opaque ; in testing the dielectric properties of fragile thin film samples under high pressure using an anvil, usually consisting of a tungsten carbide anvil, a metal press plate used as an electrode, and an electrically insulating washer

The difficulty in the prior art is that under different pressure conditions, the effective area, the distance between the electrodes is variable, and it is especially difficult to estimate the effective electrode area due to the deformation of the gasket

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