Abstract
The microscopic magnetic nature of the -site ordered chromium perovskites and and their solid-solution system, , with , 0.4, and 0.8, has been studied with muon spin rotation and relaxation () measurements down to 2 K using a powder sample. For , revealed the formation of static antiferromagnetic (AF) order below 122 K (), although magnetization measurements showed a very small change at . Analyses of the internal magnetic field at the muon sites, predicted with first-principles calculations, suggested -type AF order as a ground state. For with K, also supported the presence of a -type AF ordered state, which was recently proposed based on neutron diffraction measurements. However, the ordered Cr moments were found to change the direction at around 10 K. For , both and at 2 K increase monotonically with .
7 More- Received 11 September 2017
DOI:https://doi.org/10.1103/PhysRevB.97.024416
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Published by the American Physical Society