Local Electronic and Magnetic Studies of an Artificial La2FeCrO6 Double Perovskite
Benjamin Gray, Ho Nyung Lee, Jian Liu, J. Chakhalian, and J. W., Freeland
TL;DR
This study uses element-resolved polarized x-ray probes to investigate the electronic and magnetic properties of an artificially created La2FeCrO6 double perovskite thin film, revealing small magnetic moments contrary to prior expectations.
Contribution
It demonstrates the successful synthesis of a rock salt double perovskite structure in thin film form and provides detailed element-specific magnetic and electronic insights.
Findings
Fe and Cr are in the 3+ valence state
Magnetic moments are small and show no remanence
The structure is a rock salt double perovskite in thin film form
Abstract
Through the utilization of element-resolved polarized x-ray probes, the electronic and magnetic state of an artificial La2FeCrO6 double perovskite were explored. Applying unit-cell level control of thin film growth on SrTiO3 (111), the rock salt double perovskite structure can be created for this system, which does not have an ordered perovskite phase in the bulk. We find that the Fe and Cr are in the proper 3+ valence state, but, contrary to previous studies, the element-resolved magnetic studies find the moments in field are small and show no evidence of a sizable magnetic moment in the remanent state.
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