Indexed by: Journal paper

First Author: Jinghua Li

Correspondence Author: Ying Chen,Yanfeng Guo

Co-author: Kazunari Yamaura,Youguo Shi,Gang Xu,Taras Kolodiazhnyi,Belik A Alexei,Yoshitaka Matsushita,Hongyuan Wang,Xia Wang

Journal: Journal of Applied Physics

Included Journals: SCI

Discipline: 物理学

Document Type: J

Volume: 122

Issue: 10

Page Number: 103905

ISSN No.: 0021-8979

Date of Publication: 2017-09-14

Impact Factor: 2.176

Abstract: 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.

Links to published journals: https://pubs.aip.org/aip/jap/article-abstract/122/10/103905/346393/Electrically-insulating-properties-of-the-5d?redirectedFrom=fulltext