标题： 使用差示热分析法对相变潜热进行绝对校准 显示英文标题

标题： Absolute calibration of the latent heat of transition using differential thermal analysis

摘要： 我们描述了一种简单且精确的差示热分析装置，用于测量在77 K至室温以上的温度范围内经历突变相变的固态材料的潜热。 我们报告了一种用于过渡潜热绝对校准的数值技术，无需参考样品。 该技术应用于三种不同的样品——经历莫特转变的钒 sesquioxide，经历磁弹性转变的铋钡钌氧化物，以及一种金属间 Heusler 合金。 在每种情况下，推导出的潜热值与文献值在其误差范围内一致。 为了进一步证明绝对校准的重要性，我们表明，在非平衡动态滞后测量中，钒 sesquioxide（V$_2$O$_3$）的莫特转变的潜热变化在过饱和深度变化约10 K时仍保持恒定，变化不超过2%。 我们还将该技术应用于温度依赖比热的测量。 显示英文摘要

摘要： We describe a simple and accurate differential thermal analysis set up to measure the latent heat of solid state materials undergoing abrupt phase transitions in the temperature range from 77 K to above room temperature. We report a numerical technique for the absolute calibration of the latent heat of the transition, without the need of a reference sample. The technique is applied to three different samples -- vanadium sesquioxide undergoing the Mott transition, bismuth barium ruthenate undergoing a magnetoelastic transition, and an intermetallic Heusler compound. In each case, the inferred latent heat value agrees with the literature value to within its error margins. To further demonstrate the importance of absolute calibration, we show that the changes in the latent heat of the Mott transition in vanadium sesquioxide (V$_2$O$_3$) stays constant to within 2% even as the depth of supersaturation changes by about 10 K, in non-equilibrium dynamic hysteresis measurements. We also apply this technique for the measurement of the temperature-dependent specific heat.