Work

Long-range magnetic interaction and frustration in double perovskites Sr2NiIrO6 and Sr2ZnIrO6

Year: 2014

Type: article

Abstract: One often counts the nearest neighbouring (NN) exchange interactions for understanding of a magnetic insulator. Here we present first-principles calculations for the newly synthesized double perovskites Sr2NiIrO6 and Sr2ZnIrO6, and we find that the 2NN Ir-Ir antiferromagnetic coupling is even stronger than the 1NN Ni-Ir ferromagnetic one. Thus, the leading antiferromagnetic interactions in the fcc Ir sublattice give rise to a magnetic frustration. Sr2NiIrO6 and Sr2ZnIrO6 hence appear very similarly as a distorted low-temperature antiferromagnet (probably, of type III). This work highlights the long-range magnetic interactions of the delocalized 5d electrons, and it also addresses why the spin-orbit coupling is ineffective here.

Source: Scientific Reports

DOI: 10.1038/srep07542

Authors: Xuedong Ou, Zhengwei Li, Fengren Fan, Hongbo Wang, Hua Wu

Institutions: Fudan University, State Key Laboratory of Surface Physics, Collaborative Innovation Center of Advanced Microstructures

Language: English

Topic: Advanced Condensed Matter Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,690

Funders: National Natural Science Foundation of China, Fudan University, Ministry of Education, India