Implementation method for confirming Fe<3>GeTe<2> as novel giant magnetostrictive matedal
A technology of giant magnetostriction and realization method, which is applied in the direction of magnetostrictive performance measurement, material magnetic variable, magnetic performance measurement, etc., and can solve problems such as limitations
Active Publication Date: 2020-01-17
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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[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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The invention discloses an implementation method for confirming Fe<3>GeTe<2> as a novel giant magnetostrictive material. The implementation method includes a material growing method and a testing method, and belongs to the technical field of magnetostrictive materials. The method comprises the following steps: a single crystal Fe<3>GeTe<2> bulk material is prepared; the single crystal Fe<3>GeTe<2>bulk material is made into a plane-parallel capacitor; under an external magnetic field, it is judged whether the material has a magnetostrictive effect according to the capacitance change of the plane-parallel capacitor; and an accurate magnetostrictive coefficient of the material can be obtained. The method directly confirms that the Fe<3>GeTe<2> material has a huge magnetostrictive effect by means of experiments for the first time; the magnetostrictive coefficients at different temperatures are accurately obtained; the detailed guidance to the practical application of the material is given; and the potential of the material for future applications 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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Login to View More 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