α-β and β-γ phase boundaries of solid oxygen observed by adiabatic magnetocaloric effect
α-β and β-γ phase boundaries of solid oxygen observed by adiabatic magnetocaloric effect
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绝热磁热效应观测到的固氧α-β和β-γ相界
DOI：
10.1103/physrevb.95.104420
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
T. C. Kobayashi
中科院分区：
文献类型：
--
作者：
T. Nomura;Y. Kohama;Y. H. Matsuda;K. Kindo;T. C. Kobayashi
利用脉冲磁场绝热磁热效应（MCE）研究了固态氧的磁场-温度相图。由于场诱导的转变，在略低于相变温度时观察到相对较大的温度降低和滞后。这些相界的磁场依赖性被获得为K和K。磁Clausius-Clapeyron方程定量地解释了，但没有。MCE曲线是典型的一级相变，而MCE曲线似乎兼有一级相变和二级相变的特征。我们讨论了相变的顺序，并提出了异常行为的可能原因。
The magnetic-field-temperature phase diagram of solid oxygen is investigated by the adiabatic magnetocaloric effect (MCE) measurement with pulsed magnetic fields. Relatively large temperature decrease with hysteresis is observed at just below theandphase-transition temperatures owing to the field-induced transitions. The magnetic field dependence of these phase boundaries are obtained asK andK. The magnetic Clausius-Clapeyron equation quantitatively explains thedependence of, but does not. The MCE curve atis of typical first order, while the curve atseems to have both characteristics of first- and second-order transitions. We discuss the order of thephase transition and propose possible reasons for the unusual behaviors.