一维螺旋链金属-有机杂化物中的初始自旋偶极耦合
Incipient spin-dipole coupling in a 1D helical-chain metal-organic hybrid
摘要：
低维磁性系统（如自旋链）由于其奇异的磁性而被广泛研究。在这里，我们要解决的是，这样的系统也应该是有趣的介电，铁电和磁介电耦合领域。作为一个原型的例子，我们已经研究了一个一维（1D）的螺旋链金属-有机杂化系统的手性结构，在55 K（Tmax）附近的磁化率显示出一个宽的驼峰。复介电常数正好跟踪这个功能，这表明在这个手性系统的内在磁介电耦合。在Tmax时的偶极有序是由于晶格畸变而发生的，晶格畸变有助于最小化伴随着1D磁有序的磁能，反之亦然。本实验为设计和研究具有铁电性和磁介电耦合手性结构的有机-无机杂化磁性体系奠定了基础。
英文摘要：
Low dimensional magnetic systems (such as spin-chain) are extensively studied due to their exotic magnetic properties. Here, we would like to address that such systems should also be interesting in the field of dielectric, ferroelectricity and magnetodielectric coupling. As a prototype example, we have investigated a one-dimensional (1D) helical-chain metal-organic hybrid system with a chiral structure which shows a broad hump in magnetic susceptibility around 55 K (Tmax). The complex dielectric constant exactly traces this feature, which suggests intrinsic magnetodielectric coupling in this chiral system. The dipolar ordering at Tmax occurs due to lattice-distortion which helps to minimize the magnetic energy accompanied by 1D-magnetic ordering or vice-versa. This experimental demonstration initiates a step to design and investigate hybrid organic-inorganic magnetic systems consisting of chiral structure towards ferroelectricity and magnetodielectric coupling.
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