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專利授權區

專利授權區
專利名稱(中)	零磁場居禮溫度的量測方法與電腦可讀取記錄媒體
專利名稱(英)	ZERO MAGNETIC FIELD CURIE TEMPERATURE MEASURING METHOD AND COMPUTER-READABLE RECORDING MEDIUM
專利家族	中華民國：I767650
專利權人	國立清華大學 100%
發明人	葉安洲,林君潾
技術領域	材料化工

專利摘要(英)
A zero magnetic field Curie temperature measuring method and a computer-readable recording medium are provided. The zero magnetic field Curie temperature measuring method includes first obtaining a linear coefficient of thermal expansion (CTE) signal of a sample for determining an initial temperature and an end temperature of second order phase transition according to the change rate of the thermal expansion coefficient in a curve of the thermal expansion coefficient α versus temperature, and then calculating a theoretical CTE αT of the sample with a formula to obtain a curve of the CTE of the sample versus temperature when the sample is under non-magnetic condition. A magnetic CTE αm of the sample is calculated with a formula to obtain a curve of the magnetic CTE of the sample versus temperature within the temperature range of above-mentioned initial temperature ± a predetermined temperature. A magnetization X of the sample is calculated with a formula to obtain a curve of the magnetization X of the sample versus temperature under zero magnetic field. A curve of a magnetization decay rate ρ of the sample versus temperature is calculated with a formula, wherein the temperature point corresponding to the maximum slope of the curve is Curie temperature of the sample under zero magnetic field.

專利摘要(英)

A zero magnetic field Curie temperature measuring method and a computer-readable recording medium are provided. The zero magnetic field Curie temperature measuring method includes first obtaining a linear coefficient of thermal expansion (CTE) signal of a sample for determining an initial temperature and an end temperature of second order phase transition according to the change rate of the thermal expansion coefficient in a curve of the thermal expansion coefficient α versus temperature, and then calculating a theoretical CTE αT of the sample with a formula to obtain a curve of the CTE of the sample versus temperature when the sample is under non-magnetic condition. A magnetic CTE αm of the sample is calculated with a formula to obtain a curve of the magnetic CTE of the sample versus temperature within the temperature range of above-mentioned initial temperature ± a predetermined temperature. A magnetization X of the sample is calculated with a formula to obtain a curve of the magnetization X of the sample versus temperature under zero magnetic field. A curve of a magnetization decay rate ρ of the sample versus temperature is calculated with a formula, wherein the temperature point corresponding to the maximum slope of the curve is Curie temperature of the sample under zero magnetic field.

聯絡資訊
承辦人姓名	楊美茹
承辦人電話	03-5715131 #62305
承辦人Email	mjyang2@mx.nthu.edu.tw