部分无序La2NiMnO6的近室温巨磁介电性和多玻璃性质
Near room-temperature colossal magnetodielectricity and multiglass properties in partially-disordered La2NiMnO6
摘要：
我们报告的磁性，介电和磁介电响应的纯单斜体相的部分无序的La 2NiMnO 6，表现出一系列不寻常的属性，并建立该系统本质上是一个真正的多玻璃与大磁介电耦合（8-20%）在很宽的温度范围内（150 - 300 K）。具体来说，我们的研究结果建立了一个独特的方式来获得巨大的磁介电性，独立于任何的伸缩效应，通过工程的非对称跳跃贡献的介电常数通过调谐相邻的磁性离子之间的相对自旋取向在过渡金属氧化物系统。我们讨论的反网站（镍锰）的障碍出现这些不寻常的性能的作用。
英文摘要：
We report magnetic, dielectric and magnetodielectric responses of pure monoclinic bulk phase of partially-disordered La2NiMnO6, exhibiting a spectrum of unusual properties and establish that this system intrinsically is a true multiglass with a large magnetodielectric coupling (8-20%) over a wide range of temperatures (150 - 300 K). Specifically, our results establish a unique way to obtain colossal magnetodielectricity, independent of any striction effects, by engineering the asymmetric hopping contribution to the dielectric constant via the tuning of the relative spin orientations between neighboring magnetic ions in a transition metal oxide system. We discuss the role of anti-site (Ni-Mn) disorder in emergence of these unusual properties.
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