Surface defect free growth of a spin dimer TlCuCl₃ compound crystals and investigations on its optical and magnetic properties

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• 作者：Gihun Ryu^a ; ^{G.Ryu@fkf.mpg.de" class="auth_mail" title="E-mail the corresponding author} ; Kwanghyo Son^b
• 关键词：Spin dimer compound ; Crystal growth ; Optical properties ; Magnetic properties
• 刊名：Journal of Solid State Chemistry
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：237
• 期：Complete
• 页码：358-363
• 全文大小：2886 K

文摘

A defect-free high quality single crystal of spin dimer TlCuCl₃ compound is firstly synthesized at the optimal growth temperature using the vertical Bridgman method. In this study, we clearly found that the cupric chloride is easily decomposed into the Cl⁻ deficient composition at ≥470 °C. The Cl⁻- related gas phase at the high temperature region also always gives rise to a pinhole-like surface defect at the surface of crystal. Therefore, we clearly verified an exotic anisotropic magnetic behavior (anisotropic ratio of M_b/M₍₂₀₁₎ at 2 K, 7 T=10) using the defect-free TlCuCl₃ crystals in this three-dimensional spin dimer TlCuCl₃ compound, relatively stronger magnetic ordering in the H//b than that of H//(201) direction at above the transition magnetic field.