a way to get fe 3 to get 2 The method of magnetostriction
A technology of magnetostriction coefficient and external magnetic field, which can be used in the measurement of magnetostriction performance, material magnetic variables, magnetic performance measurement, etc., and can solve problems such as limitations
Active Publication Date: 2021-10-22
NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI
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Problems solved by technology
Despite theoretical predictions that Fe 3 GeTe 2 The material has a giant magnetostrictive effect, but so far, no experiments have confirmed this, which severely limits the Fe 3 GeTe 2 Application of materials in the field of magnetostriction
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Embodiment
[0059] High quality Fe 3 GeTe 2 The preparation of single crystal samples specifically includes the following steps:
[0060] (1) In an atmospheric environment, clean the inner and outer walls of the long quartz tube and the quartz column with absolute ethanol;
[0061] (2) Put metal iron, metal germanium, tellurium, quartz tube, quartz wool, quartz column, and quartz tube sealing device into a glove box with an argon atmosphere;
[0062] (3) In the glove box, metal iron, metal germanium and tellurium are put into one end of the long quartz tube according to the atomic ratio of 3:1:2, and then the other end of the quartz tube (near the opening) is stuffed with quartz wool. Place a quartz column on the quartz wool, and finally use a quartz tube sealing device to seal the opening of the quartz tube to isolate the inside of the quartz tube from the outside gas;
[0063] (4) Take the sealed quartz tube out of the glove box, and vacuum the quartz tube to 1×10 through the “mechan...
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Abstract
The invention discloses a method for confirming Fe 3 GeTe 2 The invention belongs to a realization method of a novel giant magnetostrictive material, includes a material growth method and a testing method, and belongs to the technical field of magnetostrictive materials. The method comprises the steps of: preparing single crystal Fe 3 GeTe 2 bulk material; the single crystal Fe 3 GeTe 2 The bulk material is made into a parallel plate capacitor. Under an external magnetic field, it is judged whether the material has a magnetostrictive effect according to the change of the capacitance value of the parallel plate capacitor, and its accurate magnetostrictive coefficient can be obtained. For the first time, the present invention directly confirms that Fe 3 GeTe 2 The material has a huge magnetostriction effect, and the magnetostriction coefficient at different temperatures is accurately obtained, and detailed guidance is given for its practical application, and its potential for future application in real life is clarified.
Description
technical field [0001] The invention belongs to the technical field of magnetostrictive materials, in particular to a 3 GeTe 2 It belongs to the realization method of new giant magnetostrictive material, including the growth method and test method of the material. Background technique [0002] Magnetostriction is the phenomenon in which the magnetization of ferromagnetic and ferrimagnetic materials rearranges under an applied magnetic field so that their shape or latitude changes. To put it simply, when ferromagnetic and ferrimagnetic materials are magnetized by an external magnetic field, their volume and length change; when the external magnetic field is lost, their volume and length return to their original state. [0003] As early as the middle of the 19th century, this phenomenon had practical applications; for example, the acoustic transducer vibrator (ultrasonic generator) made of the magnetostrictive effect of magnetic materials such as nickel, gold coal-based allo...
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IPC IPC(8): G01R33/18G01N27/72G01N1/28
CPCG01N1/28G01N27/72G01R33/18
Inventor 王振宇张云江天于亚运马明祥周侗
Owner NAT INNOVATION INST OF DEFENSE TECH PLA ACAD OF MILITARY SCI