Large Tuning of Electroresistance in an Electromagnetic Device Structure Based on the Ferromagnetic-Piezoelectric Interface

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Zhenping Wu
  • Margherita Boselli
  • Alexandre Fête
  • Marta Gibert
  • Michel Viret
  • Stefano Gariglio

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)18984–18990
Journal / PublicationACS Applied Materials and Interfaces
Volume13
Issue number16
Online published14 Apr 2021
Publication statusPublished - 28 Apr 2021

Abstract

The electrical control of the conducting state through phase transition and/or resistivity switching in heterostructures of strongly correlated oxides is at the core of the large on-going research activity of fundamental and applied interest. In an electromechanical device made of a ferromagnetic-piezoelectric heterostructure, we observe an anomalous negative electroresistance of ∼-282% and a significant tuning of the metal-to-insulator transition temperature when an electric field is applied across the piezoelectric. Supported by finite-element simulations, we identify the electric field applied along the conducting bridge of the device as the plausible origin: stretching the underlying piezoelectric substrate gives rise to a lattice distortion of the ferromagnetic manganite overlayer through epitaxial strain. Large modulations of the resistance are also observed by applying static dc voltages across the thickness of the piezoelectric substrate. These results indicate that the emergent electronic phase separation in the manganites can be selectively manipulated when interfacing with a piezoelectric material, which offers great opportunities in designing oxide-based electromechanical devices.

Research Area(s)

  • electronic phase separation, manganite, negative electroresistance, piezoelectric, strain

Citation Format(s)

Large Tuning of Electroresistance in an Electromagnetic Device Structure Based on the Ferromagnetic-Piezoelectric Interface. / Wu, Zhenping; Boselli, Margherita; Li, Danfeng; Fête, Alexandre; Gibert, Marta; Viret, Michel; Gariglio, Stefano.

In: ACS Applied Materials and Interfaces, Vol. 13, No. 16, 28.04.2021, p. 18984–18990.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review