论文标题
呼吸pyrochlore磁铁LIACR $ _4 $ x $ _8 $（a = ga，in，x = o，s）
Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr$_4$X$_8$ (A = Ga, In, X = O, S)
论文作者
论文摘要
我们报告了呼吸pyrochlore磁铁LIACR $ _4 $ x $ _8 $（a = ga，in，x = o，s）中的热膨胀和磁截图。这四种化合物均显示出大量的收缩，与抗磁磁性有降低，温度降低。在Neél温度上方，LIGACR4S8显示出负热膨胀，Liincr4O8显示出正热膨胀，并倾斜温度依赖性，而Liincr4s8显示出正磁性磁结束。所有这些现象可能是由呼吸pyrochlore结构与J和J'内的复杂结构磁性相关性引起的。这些结果表明，呼吸pyrochlore磁铁有望实现与它们的磁性相关的各种体积现象，不仅在磁有序的相中，而且在顺磁相中也是如此。
We report thermal expansion and magnetostriction in breathing pyrochlore magnets LiACr$_4$X$_8$ (A = Ga, In, X = O, S) measured by a dilatometric method on sintered samples. All four of these compounds showed a large volume contraction associated with antiferromagnetic order with decreasing temperature. Above the Neél temperature, LiGaCr4S8 showed negative thermal expansion, LiInCr4O8 showed positive thermal expansion with concave-downward temperature dependence, and LiInCr4S8 showed positive forced volume magnetostriction. All these phenomena are likely caused by the complex structure-magnetism correlation within the breathing pyrochlore structure with J and J'. These results suggested that breathing pyrochlore magnets are promising for the realization of various volumetric phenomena related to their magnetism not only in the magnetically-ordered phase but also in the paramagnetic phase.
