Absence of moment fragmentation in the mixed B -site pyrochlore Nd 2 GaSbO 7
Absence of moment fragmentation in the mixed B -site pyrochlore Nd 2 GaSbO 7
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混合 B 位烧绿石 Nd 2 GaSbO 7 中不存在矩碎裂
DOI：
10.1103/physrevb.103.214419
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发表时间：
2021
影响因子：
3.7
通讯作者：
Gomez S
中科院分区：
文献类型：
--
作者：
Gomez S
钕基烧绿石氧化物的形式已经获得了大量的兴趣，由于瞬间碎裂物理观察和推测。值得注意的是，这种现象在这个家族中并不普遍，因为它不存在，其特点是在该网站上的离子半径较小。在这里，我们探索的时刻破碎的必要条件，在钕烧绿石家庭通过详细的研究混合位烧绿石。该系统的特点是无序性明显，平均离子半径极小。类似地，我们通过我们的体表征和中子散射实验没有发现矩碎裂的证据，表明化学压力（不一定是现场无序）在该材料家族中存在或不存在这种现象中起着关键作用。令人惊讶的是，存在的显着的网站的障碍indoes不产生自旋玻璃基态，而是在其他钕辉石确定相同的全进全出磁秩序被发现在这里。
Nd-based pyrochlore oxides of the formhave garnered a significant amount of interest owing to the moment fragmentation physics observed inand speculated in. Notably this phenomenon is not ubiquitous in this family, as it is absent in, which features a smaller ionic radius on thesite. Here, we explore the necessary conditions for moment fragmentation in the Nd pyrochlore family through a detailed study of the mixed-site pyrochlore. Thesite of this system is characterized by significant disorder and an extremely small average ionic radius. Similarly to, we find no evidence for moment fragmentation through our bulk characterization and neutron scattering experiments, indicating that chemical pressure (and not necessarily the-site disorder) plays a key role in the presence or absence of this phenomenon in this material family. Surprisingly, the presence of significant-site disorder indoes not generate a spin-glass ground state and instead the same all-in-all-out magnetic order identified in other Nd pyrochlores is found here.