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Mechanical Switching of Nanoscale Multiferroic Phase Boundaries

Journal Article · · Advanced Functional Materials
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [1];  [1];  [2];  [6];  [8];  [5];  [2];  [2];  [1]
  1. Beijing Normal University (China). Dept. of Physics
  2. Tsinghua Univ., Beijing (China). School of Materials Science and Engineering
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Science Directorate
  4. Univ. of Antwerp (Belgium). EMAT (Electron Microscopy for Materials Science)
  5. Xi'an Jiaotong Univ., Xi'an (China). Frontier Inst. of Science and Technology and State Key Lab. for Mechanical Behavior of Materials
  6. Peking Univ., Beijing (China). Dept. of Geriatric Dentistry and School and Hospital of Stomatology
  7. Department of Materials Science and Engineering; Pennsylvania State University; University Park; PA 16802 USA
  8. City Univ. of Hong Kong (Hong Kong). Centre for Advanced Structural Materials and Dept. of Mechanical and Biomedical Engineering

Tuning the lattice degree of freedom in nanoscale functional crystals is critical to exploit the emerging functionalities such as piezoelectricity, shape-memory effect, or piezomagnetism, which are attributed to the intrinsic lattice-polar or lattice-spin coupling. In this study, it is reported that a mechanical probe can be a dynamic tool to switch the ferroic orders at the nanoscale multiferroic phase boundaries in BiFeO3 with a phase mixture, where the material can be reversibly transformed between the “soft” tetragonal-like and the “hard” rhombohedral-like structures. The microscopic origin of the nonvolatile mechanical switching of the multiferroic phase boundaries, coupled with a reversible 180° rotation of the in-plane ferroelectric polarization, is the nanoscale pressure-induced elastic deformation and reconstruction of the spontaneous strain gradient across the multiferroic phase boundaries. The reversible control of the room-temperature multiple ferroic orders using a pure mechanical stimulus may bring us a new pathway to achieve the potential energy conversion and sensing applications.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1650428
Report Number(s):
LLNL-JRNL--741642; 896021
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 22 Vol. 25; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Revealing the Interplay of Structural Phase Transitions and Ferroelectric Switching in Mixed Phase BiFeO 3 journal October 2018
Strain‐Gradient‐Induced Unidirectional Magnetic Anisotropy in Nanocrystalline Thin Permalloy Films journal October 2019
Giant elastic tunability in strained BiFeO3 near an electrically induced phase transition journal November 2015
Mechanical switching in ferroelectrics by shear stress and its implications on charged domain wall generation and vortex memory devices journal January 2018
Nanoscale mechanical control of surface electrical properties of manganite films with magnetic nanoparticles journal January 2019
Giant resistive switching in mixed phase BiFeO 3 via phase population control journal January 2018
Mechanical probing of ferroelectrics at the nanoscale journal January 2019
Dynamic mechanical control of local vacancies in NiO thin films journal May 2018
Strain phase separation: Formation of ferroelastic domain structures journal December 2016
Machine learning–enabled identification of material phase transitions based on experimental data: Exploring collective dynamics in ferroelectric relaxors journal March 2018

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