What is it about?
The accurate magnetic structures of double-perovskite CaxSr2−xWMnO6 (x=0.5, 1.0, and 1.5) have been solved by neutron diffraction and supporting experiments.
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Why is it important?
The accurate magnetic structures of double-perovskite CaxSr2−xWMnO6 (x=0.5, 1.0, and 1.5) have been solved by neutron diffraction and the supporting experiments. The unique electronic structure of the double-perovskite is well known to stem from the structural and compositional flexibilities of the corner-shared octahedral network. The magnetic moment and spin orientation of the octahedral central atom are critical for establishing the electronic state of the compound. In CaxSr2−xWMnO6 (x=0.5, 1.0, and 1.5), the two Mn atoms in each crystallographic site are determined to be antiferromagnetically configurated, giving rise to the total moment of zero by symmetry, as well as a half-insulator electronic state. The average Mn moment is 4.5 μB, and the Mn spin orientations are [μx=(3.3±0.4) μB, μy=(2.5±0.3) μB, and μz=(−0.7±0.7) μB], confirming a high-spin state Mn2+(d5) electron configuration.
Perspectives
It was a great pleasure to cooperate with Winnie Wong-NG and QingZhen Huang in this article. This article also let me be more involved in the analysis of magnetic structure.
Yuqi Yang
Sichuan University of Science & Engineering
Read the Original
This page is a summary of: Neutron-powder-diffraction studies of the nuclear and magnetic structure of the double-perovskite CaxSr2−xWMnO6 (x = 0.5, 1.0, and 1.5), Journal of Applied Physics, October 2023, American Institute of Physics,
DOI: 10.1063/5.0163284.
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