文章基本信息

标题：Revisiting Goodenough-Kanamori rules in a new series of double perovskites LaSr1−xCaxNiReO6
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作者：Somnath Jana ; Payel Aich ; P. Anil Kumar 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2019
卷号：9
期号：1
页码：1-10
DOI：10.1038/s41598-019-54427-0
出版社：Springer Nature
摘要：The magnetic ground states in highly ordered double perovskites LaSr 1-x Ca x NiReO 6 (x = 0.0, 0.5, 1.0) are studied in view of the Goodenough-Kanamori rules of superexchange interactions in this paper. In LaSrNiReO 6 , Ni and Re sublattices are found to exhibit curious magnetic states separately, but no long range magnetic ordering is achieved. The magnetic transition at ~255 K is identified with the independent Re sublattice magnetic ordering. Interestingly, the sublattice interactions are tuned by modifying the Ni-O-Re bond angles through Ca doping. Upon Ca doping, the Ni and Re sublattices start to display a ferrimagnetically ordered state at low temperature. The neutron powder diffraction data reveals long range ferrimagnetic ordering of the Ni and Re magnetic sublattices along the crystallographic b-axis. The transition temperature of the ferrimagnetic phase increases monotonically with increasing Ca concentration.