single crystal
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United States of America Patent
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Jan 5, 2021
Grant Date -
Nov 26, 2020
app pub date -
Jul 30, 2019
filing date -
May 22, 2019
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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.
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