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Novel transition metal telluride with multiple quantum states and various crystal structures and preparation method ofnovel transition metal telluride

A crystal structure and transition metal technology, applied in the direction of selenium/tellurium compounds, chemical instruments and methods, elemental compounds other than selenium/tellurium, etc., to achieve the effect of improving Tc, testing stability, and uniform distribution

Pending Publication Date: 2021-08-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a long way to go to find room-temperature superconductors and the exploration of superconducting mechanisms.

Method used

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  • Novel transition metal telluride with multiple quantum states and various crystal structures and preparation method ofnovel transition metal telluride
  • Novel transition metal telluride with multiple quantum states and various crystal structures and preparation method ofnovel transition metal telluride
  • Novel transition metal telluride with multiple quantum states and various crystal structures and preparation method ofnovel transition metal telluride

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Accurately weigh 0.0133g Cu, 0.0780g Ir, 0.1081g Te and 0.007g Cr raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850 ° C for 240 h to obtain CuIr 1.94 Cr 0.06 Te 4sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by a physical comprehensive test system (PPMS) and a magnetic measurement system (MPMS): mainly including...

Embodiment 2

[0031] Accurately weigh 0.0067g Cu, 0.0381g Ir, 0.0545g Te and 0.0007g Cr raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850 ° C for 240 h to obtain CuIr 1.88 Cr 0.12 Te 4 sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by a physical comprehensive test system (PPMS) and a magnetic measurement system (MPMS): mainly includi...

Embodiment 3

[0033] Accurately weigh 0.0069g Cu, 0.0354g Ir, 0.0560g Te and 0.0017g Cr raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850 ° C for 240 h to obtain CuIr 1.7 Cr 0.3 Te 4 sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by a physical comprehensive test system (PPMS) and a magnetic measurement system (MPMS): mainly including...

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Abstract

The invention designs a series of quantum materials with a chemical general formula of CuIr2-xCrxTe4 (x is greater than or equal to 0 and less than or equal to 2) and a preparation method thereof, and belongs to the technical field of quantum functional material manufacturing. The preparation method is a traditional high-temperature solid-phase method and comprises the following steps of: fully grinding and mixing Cu, Ir, Cr and Te powder according to corresponding stoichiometric ratios; vacuumizing and sealing the powder in a quartz tube; putting the sealed vacuum quartz tube filled with the raw materials into a furnace; sintering a sample CuIr2-xCrxTe4 (0<= x<= 0.4) with a layered structure for 120 hours at 850 DEG C; sintering a sample CuIr2-xCrxTe4 (1.9 < = x < = 2) with a spinel structure for 120 hours at 500 DEG C, so as to obtain CuIr2-xCrxTe4 (0<=x <=2) polycrystalline powder. Physical properties such as conductivity, magnetic properties, upper and lower critical fields and the like of the polycrystalline powder are measured through a comprehensive physical property test system (PPMS) and a magnetic measurement system (MPMS), basic properties of quantum states such as superconductivity, charge density wave phase change, ferromagnetic phase change and the like of a target product are discussed, a relational graph of specific doping concentration and respective quantum states is established, and the crystal structure of the target product is analyzed through XRD data fitting.

Description

technical field [0001] The invention belongs to the technical field of manufacturing quantum functional materials, and specifically relates to a series of chemical general formula CuIr 2-x Cr x Te 4 (0≤x≤2) novel transition metal tellurides with abundant quantum states and methods for their preparation. Background technique [0002] The different interaction forces between spins, electrons and phonons produce interesting macroscopic quantum phenomena such as superconductivity, ferromagnetism and antiferromagnetism. Therefore, studying the interactions of these different degrees of freedom in strongly coupled electronic lattice systems is crucial for understanding and optimizing their relevant properties. Superconductivity is one of the most fascinating macroscopic quantum phenomena in physics. Superconducting materials refer to materials that exhibit zero resistance and repel magnetic force lines under certain temperature conditions (generally lower temperatures). The pe...

Claims

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Application Information

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IPC IPC(8): C01B19/00
CPCC01B19/002C01P2002/88C01P2006/40C01P2002/72C01P2006/42
Inventor 罗惠霞曾令勇何溢懿佳玛
Owner SUN YAT SEN UNIV