Method for making MnBi2Te4 single crystal
AssigneesTsinghua University, Hon Hai Precision Industry Co., Ltd.
InventorsHao Li, Yang Wu, Yue-Gang Zhang, Shou-Shan Fan
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Abstract
A method for making MnBi2Te4 single crystal is provided. The method includes: providing a mixture of polycrystalline MnTe and polycrystalline Bi2Te3 in Molar ratio of 1.1:1˜1:1.1; heating the mixture in a vacuum reaction chamber to 700° C.˜900° C., cooling the mixture to 570° C.˜600° C. slowly with a speed less than or equal to 1° C./hour, and annealing the mixture at 570° C.˜600° C. for a time above 10 days to obtain an intermediate product; and air quenching the intermediate product from 570° C.˜600° C. to room temperature. The method for making MnBi2Te4 single crystal is simple and has low cost.
Claims16
A method for making MnBi2Te4 single crystal, the method comprising:
- providing a mixture of polycrystalline MnTe and polycrystalline Bi2Te3 in Molar ratio of 1.1:1˜1:1.1;
- heating the mixture in a vacuum reaction chamber to 700° C.˜900° C., cooling the mixture to 570° C.˜600° C. at a speed less than or equal to 1° C./hour, and annealing the mixture at 570° C.˜600° C. for at least 10 days to obtain an intermediate product;
- and
- air quenching the intermediate product from 570° C.˜600° C. to room temperature.
A method for making MnBi2Te4 single crystal, the method comprising:
- mixing elemental Mn, Bi and Te in Molar ratio of 1:2:4 to obtain a Mn/Bi/Te mixture;
- sintering the Mn/Bi/Te mixture in a vacuum reaction chamber at 700° C.˜900° C. for approximately 3˜5 days to obtain a mixture of polycrystalline MnTe and polycrystalline Bi2Te3;
- cooling the mixture to 570° C.˜600° C. at a speed less than or equal to 1° C./hour;
- annealing the mixture at 570° C.˜600° C. for at least 10 days to obtain an intermediate product;
- and
- air quenching the intermediate product from 570° C.˜600° C. to room temperature.
Dependencies are inferred from the claim text.