外加磁场对纯金属比热影响的实验研究与计算

来源期刊：上海金属2010年第5期

论文作者：何燕霖 朱娜琼 邵光杰 邹楠 李麟

文章页码：14 - 16

关键词：PPMS； 磁场强度； 比热； 纯金属

Key words：PPMS； Magnetic Field； Specific Heat； Pure Metals

摘    要：采用PPMS物性测量系统测定了纯Cu在不同磁场强度(0、3、6、9 T)作用下,2~300 K温度区间内的比热值以及纯Fe在0~9 T磁场强度范围内,5~300 K温度区间的等温磁化曲线。根据实验与计算结果可以看出,在强度为0~9 T的外加磁场作用下,纯Cu、纯Fe在所研究温度范围内的比热值基本无变化;在研究其固溶体或化合物在外加磁场作用下的自由能时,应当重在考虑磁场强度对其混合自由能的作用。

Abstract: Specific heat values of pure Cu in the magnetic field with the strength of 0,3,6,9 T respectively were obtained by PPMS(Physics Property Measurement System) within the temperature range from 2 K to 300 K.Isothermal magnetization curves of pure Fe at the temperature ranging from 5 K to 300 K were also obtained while the external magnetic field with the strength up to 9 T was applied.The experimental and calculation results showed that magnetic field had no effect on the specific heat values of diamagnetic Cu and Fe,while for its solid solution and compounds,the effects of magnetic field on free energy of mixing should be concerned.