Observation of Ferroelastic Domains in Layered Magnetic Compounds Using Birefringence Imaging System
Observation of Ferroelastic Domains in Layered Magnetic Compounds Using Birefringence Imaging System
复制标题
使用双折射成像系统观察层状磁性化合物中的铁弹性域
DOI：
10.1088/1742-6596/969/1/012153
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
and Hirotaka Manaka
中科院分区：
文献类型：
--
作者：
Yoko Miura;Kazuya Okumura;Takumi Fukuda;and Hirotaka Manaka
二维海森堡反铁磁体（C2 H5 NH3）2CuCl 4是铁电性和铁弹性共存的候选化合物;然而，多铁性畴的微观观察可能仍然不清楚。进行面内双折射成像测量以观察铁电畴和铁弹畴在15 K和300 K之间的相变期间变化的方式。结果表明，在300 K时，ab面上出现了90个铁弹畴。随着温度降低到15 K，每个域反转在一定的温度（Ta）没有结构或磁性相变。的值被发现是显着的外部应力的影响，因此，双折射成像技术是有用的，用于调查铁弹域随温度的变化。此外，在230~ 240 K温度范围内发生了从正交晶向单斜晶或三斜晶的结构相变，但在整个研究范围内，ab面没有出现自发极化。
The two-dimensional Heisenberg antiferromagnet (C 2 H 5 NH 3) 2 CuCl 4 is a candidate compound for the coexistence of ferroelectricity and ferroelasticity; however, the microscopic observations of multiferroic domains may still be unclear. In-plane birefringence imaging measurements were performed to observe the manner in which the ferroelectric and the ferroelastic domains change during phase transitions between 15 K and 300 K. It was found that 90 ferroelastic domains appeared in the ab-plane at 300 K. As the temperature decreased toward 15 K, each domain inverted at a certain temperature (T a) without structural or magnetic phase transitions. The value of T a was found to be significantly influenced by external stresses; therefore, birefringence imaging techniques are useful for investigating variations in ferroelastic domains with temperature. Furthermore, a structural phase transition from orthorhombic to monoclinic or triclinic occurred at 230~ 240 K; however, no spontaneous polarization appeared in the ab-plane over the entire investigated range.