Extending the n=2 Ruddlesden-Popper Solid Solution La2-2xSr1+2xMn2O7 Beyond x=0.5: Synthesis of Mn4+-rich Compounds
Julie E. Millburn, John F. Mitchell, Dimitri N. Argyriou
TL;DR
This study synthesizes and characterizes new Mn4+-rich La2-2xSr1+2xMn2O7 compounds beyond x=0.5, revealing their structural and magnetic properties through high-temperature synthesis and annealing.
Contribution
It introduces a novel synthesis method for metastable manganites with high Mn4+ content, expanding the compositional range of this CMR system.
Findings
New metastable La2-2xSr1+2xMn2O7 compounds synthesized
Structural and magnetic properties characterized at room temperature
Access to previously unexplored compositions in the manganite system
Abstract
We report the synthesis and room temperature crystal structures of the heretofore unknown, metastable manganites La2-2xSr1+2xMn2O7+delta (0.5 < x < 0.9) via high-temperature (T=1650 C) quenching followed by low-temperature (T=400 C) annealing to fill oxygen vacancies; this approach enables access to the electronic, magnetic, and structural properties of previously unexplored compositions in this important CMR system.
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Taxonomy
TopicsInorganic Chemistry and Materials · Zeolite Catalysis and Synthesis · Thermal and Kinetic Analysis