论文类型：期刊论文
第一作者：Jinghua Li
通讯作者：Ying Chen,Yanfeng Guo
合写作者：Kazunari Yamaura,Youguo Shi,Gang Xu,Taras Kolodiazhnyi,Belik A Alexei,Yoshitaka Matsushita,Hongyuan Wang,Xia Wang
发表刊物：Journal of Applied Physics
收录刊物：SCI
学科门类：物理学
文献类型：J
卷号：122
期号：10
页面范围：103905
ISSN号：0021-8979
发表时间：2017-09-14
影响因子：2.176
摘要：A high-pressure-synthesized double perovskite Sr2YOsO6 was investigated by synchrotron X-ray diffraction and measurements of its magnetic susceptibility, specific heat capacity, complex impedance, and complex dielectric constant. It crystallized into a monoclinic double perovskite structure (P21/n) with complete ordering of the Y and Os atoms. Its magnetic behaviors, including the antiferromagnetic transition temperature (∼52 K), Curie-Weiss effective moment [3.48(5) μB/Os], and Weiss temperature [−350.1(7) K], were close to the respective values of Sr2YOsO6 previously synthesized without an applied pressure of 6 GPa. Transport property measurements revealed that the lower limit of the activation energy was 192(1) meV and the charge gap remained open regardless of the presence of magnetic order, conflicting with the electron delocalization predicted by theoretical calculations. Further consideration, including theoretical and experimental investigations of the roles of spin–orbit coupling and U of the 5d electrons of Os 5d-t2g3, may assist in understanding the general magnetic and insulating behaviors of quasi-half-filled 5d-t2g3oxides in the perovskite category toward the use of 5d double perovskite for magnetic applications.
发布期刊链接：https://pubs.aip.org/aip/jap/article-abstract/122/10/103905/346393/Electrically-insulating-properties-of-the-5d?redirectedFrom=fulltext