Photoemission electron microscopy of magneto-ionic effects in La0.7Sr0.3MnO3

Marek Wilhelm*, Margret Giesen, Tomáš Duchoň, Marco Moors, David N. Mueller, Johanna Hackl, Christoph Baeumer, Mai Hussein Hamed, Lei Cao, Hengbo Zhang, Oleg Petracic, Maria Glöß, Stefan Cramm, Slavomír Nemšák, Carsten Wiemann, Regina Dittmann, Claus M. Schneider, Martina Müller

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Magneto-ionic control of magnetism is a promising route toward the realization of non-volatile memory and memristive devices. Magneto-ionic oxides are particularly interesting for this purpose, exhibiting magnetic switching coupled to resistive switching, with the latter emerging as a perturbation of the oxygen vacancy concentration. Here, we report on electric-field-induced magnetic switching in a La0.7Sr0.3MnO3 (LSMO) thin film. Correlating magnetic and chemical information via photoemission electron microscopy, we show that applying a positive voltage perpendicular to the film surface of LSMO results in the change in the valence of the Mn ions accompanied by a metal-to-insulator transition and a loss of magnetic ordering. Importantly, we demonstrate that the voltage amplitude provides granular control of the phenomena, enabling fine-tuning of the surface electronic structure. Our study provides valuable insight into the switching capabilities of LSMO that can be utilized in magneto-ionic devices.

Original languageEnglish
Article number111102
JournalAPL materials
Volume8
Issue number11
DOIs
Publication statusPublished - 1 Nov 2020
Externally publishedYes

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