用中子和X射线散射测定Ca $_3$ LiOsO $_6$的磁结构
Magnetic structure determination of Ca$_3$LiOsO$_6$ using neutron and x-ray scattering
摘要：
我们提出了一个中子和X射线散射调查的Ca $_3$ LiOsO $_6$，材料预测主机磁有序仅仅通过一个扩展的超交换途径，涉及两个阴离子，相互作用机制，经历了相对较少的调查。这与普遍存在的涉及单个阴离子的超交换相互作用机制形成对比，该机制具有明确定义和长期存在的规则。尽管明显的一维性质和三角形单位的磁性锇离子的发病的磁相关性已被观察到在高温下的117 K的散装测量。我们实验确定的磁有序结构，并显示它是长程和三维的。我们的结果支持扩展超交换相互作用模型。
英文摘要：
We present a neutron and x-ray scattering investigation of Ca$_3$LiOsO$_6$, a material predicted to host magnetic ordering solely through an extended superexchange pathway involving two anions, an interaction mechanism that has undergone relatively little investigation. This contrasts with the ubiquitous superexchange interaction mechanism involving a single anion that has well defined and long standing rules. Despite the apparent 1D nature and triangular units of magnetic osmium ions the onset of magnetic correlations has been observed at a high temperature of 117 K in bulk measurements. We experimentally determine the magnetically ordered structure and show it to be long range and three dimensional. Our results support the model of extended superexchange interaction.
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