脉冲磁场中比热和热导率的同时测量
Simultaneous measurement of specific heat and thermal conductivity in pulsed magnetic fields
AI总结：
本文提出一种在反馈控制的脉冲磁场中同时测量比热和热导率的实验装置，结合闪光法在2-16 K温度范围内获取高达37.2 T的热学性质绝对值，并通过SrCu$_2$(BO$_3$)$_2$单晶样品验证了其有效性与便捷性。
摘要：
我们报告了一种实验装置，可在低温下持续50毫秒的反馈控制脉冲磁场中同时测量比热和热导率。通过反馈控制获得的稳定磁场脉冲显著提升了装置和样品的热稳定性，将其与闪光法结合使用，可在2 K至16 K温度范围内获得高达37.2 T的热学性质绝对值。我们描述了该实验装置，并通过对几何阻挫量子自旋二聚体系统SrCu$_2$(BO$_3$)$_2$单晶样品的测量，展示了本方法的性能。我们的原理验证结果与使用标准稳态法获取的数据高度一致，证实了本方法的有效性与便捷性。
英文摘要：
We report an experimental setup for simultaneously measuring specific heat and thermal conductivity in feedback-controlled pulsed magnetic fields of 50 msec duration at cryogenic temperatures. A stabilized magnetic field pulse obtained by the feedback control, which dramatically improves the thermal stability of the setup and sample, is used in combination with the flash method to obtain absolute values of thermal properties up to 37.2 T in the 2 K to 16 K temperature range. We describe the experimental setup and demonstrate the performance of the present method with measurements on single crystal samples of the geometrically frustrated quantum spin-dimer system SrCu$_2$(BO$_3$)$_2$. Our proof-of-principle results show excellent agreement with data taken using a standard steady-state method, confirming the validity and convenience of the present approach.
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