Skip to Main content Skip to Navigation
Journal articles

Influence of Nonuniform Micron-Scale Strain Distributions on the Electrical Reorientation of Magnetic Microstructures in a Composite Multiferroic Heterostructure

Abstract : Composite multiferroic systems, consisting of a piezoelectric substrate coupled with a ferromagnetic thin film, are of great interest from a technological point of view because they offer a path toward the development of ultralow power magnetoelectric devices. The key aspect of those systems is the possibility to control magnetization via an electric field, relying on the magneto-elastic coupling at the interface between the piezoelectric and the ferromagnetic components. Accordingly, a direct measurement of both the electrically induced magnetic behavior and of the piezo-strain driving such behavior is crucial for better understanding and further developing these materials systems. In this work, we measure and characterize the micron-scale strain and magnetic response, as a function of an applied electric field, in a composite multiferroic system composed of 1 and 2 μm squares of Ni fabricated on a prepoled [Pb(Mg 1/3 Nb 2/3)O 3 ] 0.69 −[PbTiO 3 ] 0.31 (PMN−PT) single crystal substrate by X-ray microdiffraction and X-ray photoemission electron microscopy, respectively. These two complementary measurements of the same area on the sample indicate the presence of a nonuniform strain which strongly influences the reorientation of the magnetic state within identical Ni microstructures along the surface of the sample. Micromagnetic simulations confirm these experimental observations. This study emphasizes the critical importance of surface and interface engineering on the micron-scale in composite multiferroic structures and introduces a robust method to characterize future devices on these length scales.
Document type :
Journal articles
Complete list of metadatas

https://hal.univ-lorraine.fr/hal-02388436
Contributor : Jon Gorchon <>
Submitted on : Sunday, December 1, 2019 - 9:35:08 PM
Last modification on : Friday, September 18, 2020 - 2:39:17 PM

Links full text

Identifiers

Citation

Roberto Lo Conte, Zhuyun Xiao, Cai Chen, Camelia Stan, J. Gorchon, et al.. Influence of Nonuniform Micron-Scale Strain Distributions on the Electrical Reorientation of Magnetic Microstructures in a Composite Multiferroic Heterostructure. Nano Letters, American Chemical Society, 2018, 18 (3), pp.1952-1961. ⟨10.1021/acs.nanolett.7b05342⟩. ⟨hal-02388436⟩

Share

Metrics

Record views

76