Evidence of a new first-order phase transition at 92 K in ((CH3)4N)2MnCl4 single crystals
Evidence of a new first-order phase transition at 92 K in ((CH3)4N)2MnCl4 single crystals
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DOI：
10.1088/0953-8984/1/26/019
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发表时间：
1989-07
期刊：
影响因子：
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通讯作者：
M. C. M. D. Lucas-M.-C.-M.-D.-Lucas-116970392;F. Rodríguez
中科院分区：
文献类型：
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作者：
M. C. M. D. Lucas-M.-C.-M.-D.-Lucas-116970392;F. Rodríguez
利用几种光学技术，在T=92 K时，在（(CH3)4N）2MnCl4单晶中发现了一个新的一阶相变。相变表现出较大的热滞后，δ T=12 K。还检测到92 K以下相的共存。详细分析了该晶体的光吸收灵敏度，以及MnCl2-4单元的发射、激发和寿命对该相变的探测灵敏度。并与T=171 K时P1121/n-P121/c1相变的结果进行了比较。
A new first-order phase transition at T=92 K has been detected in single crystals of ((CH3)4N)2MnCl4 by means of several optical techniques. The phase transition displays a large thermal hysteresis, Delta T=12 K. Coexistence of phases below 92 K is also detected. The sensitivity of the optical absorption of the crystal, as well as that of emission, excitation and lifetime of MnCl2-4 units for detecting this phase transition is analysed in detail. The results are also compared with those corresponding to the P1121/n-P121/c1 phase transition at T=171 K.