Electrochemical Proton Injection Induced Phase Transitions in Hydrothermally Synthesized A-Site Multi-doped Manganate Perovskites

Abstract

Phase transitions in strongly correlated system materials have good reproducibility due to the differences before and after the transition, and they have application prospects in fields, such as memory storage and electrochromic materials. Driving protons in ionic liquids into the material lattice using an electric field is an effective way to change the electronic structure of strongly correlated systems and induce their phase transitions. In this study, we used the electrochemical proton injection method to introduce protons into La_1−x−yCa_xK_yMnO₃ manganate perovskites with different properties. The combination of protons with O in the lattice hinders the double exchange interaction, preventing effective electron transfer and thereby triggering a phase transition. This work complements the understanding of the effects of proton injection on bulk materials, deepens the understanding of the mechanism of proton injection-induced phase transitions, and provides new ideas for the preparation of novel multifunctional devices.

Keywords

Proton injection / Manganate perovskite / Induced phase transition / Strongly correlated system

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