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Title: Strain-tunable magnetism at oxide domain walls

Abstract

Applying stress to a ferroelastic material results in a nonlinear strain response as domains of different orientations mechanically switch. The ability to write, erase and move domain walls between such ferroelastic domains suggests a method for making nanoelectronics where the domain wall is the device. However, little is known about the magnetic properties of such domain walls. A fascinating model system is SrTiO3, where the ferroelastic domain walls display strain-tunable polarity and enhanced conductivity. Here, we reveal a long-range magnetic order with modulations along the ferroelastic domain walls in SrTiO3 and SrTiO3-based heterointerfaces, which manifests itself as a striped pattern in scanning superconducting quantum interference device maps of the magnetic landscape. In conducting interfaces, the magnetism is coupled to itinerant electrons with clear signatures in magnetotransport measurements. The magnetic state is also coupled dynamically to the lattice and can be reversibly tuned by applying local external forces. As a result, this study raises the possibility of designing nanoscale devices based on domain walls where strain-tunable ferroelectric, ferroelastic and ferromagnetic orders may coexist.

Authors:
 [1];  [2]; ORCiD logo [1];  [3]; ORCiD logo [4];  [5];  [1];  [2];  [4]; ORCiD logo [1]; ORCiD logo [2]
  1. Technical Univ. of Denmark, Roskilde (Denmark)
  2. Bar-Ilan Univ., Ramat-Gan (Israel)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States); Zhejiang Univ., Hangzhou (China)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1505432
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Nature Physics
Additional Journal Information:
Journal Volume: 15; Journal Issue: 3; Journal ID: ISSN 1745-2473
Publisher:
Nature Publishing Group (NPG)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Christensen, D. V., Frenkel, Y., Chen, Y. Z., Xie, Y. W., Chen, Z. Y., Hikita, Y., Smith, A., Klein, L., Hwang, H. Y., Pryds, N., and Kalisky, B. Strain-tunable magnetism at oxide domain walls. United States: N. p., 2018. Web. doi:10.1038/s41567-018-0363-x.
Christensen, D. V., Frenkel, Y., Chen, Y. Z., Xie, Y. W., Chen, Z. Y., Hikita, Y., Smith, A., Klein, L., Hwang, H. Y., Pryds, N., & Kalisky, B. Strain-tunable magnetism at oxide domain walls. United States. doi:10.1038/s41567-018-0363-x.
Christensen, D. V., Frenkel, Y., Chen, Y. Z., Xie, Y. W., Chen, Z. Y., Hikita, Y., Smith, A., Klein, L., Hwang, H. Y., Pryds, N., and Kalisky, B. Mon . "Strain-tunable magnetism at oxide domain walls". United States. doi:10.1038/s41567-018-0363-x. https://www.osti.gov/servlets/purl/1505432.
@article{osti_1505432,
title = {Strain-tunable magnetism at oxide domain walls},
author = {Christensen, D. V. and Frenkel, Y. and Chen, Y. Z. and Xie, Y. W. and Chen, Z. Y. and Hikita, Y. and Smith, A. and Klein, L. and Hwang, H. Y. and Pryds, N. and Kalisky, B.},
abstractNote = {Applying stress to a ferroelastic material results in a nonlinear strain response as domains of different orientations mechanically switch. The ability to write, erase and move domain walls between such ferroelastic domains suggests a method for making nanoelectronics where the domain wall is the device. However, little is known about the magnetic properties of such domain walls. A fascinating model system is SrTiO3, where the ferroelastic domain walls display strain-tunable polarity and enhanced conductivity. Here, we reveal a long-range magnetic order with modulations along the ferroelastic domain walls in SrTiO3 and SrTiO3-based heterointerfaces, which manifests itself as a striped pattern in scanning superconducting quantum interference device maps of the magnetic landscape. In conducting interfaces, the magnetism is coupled to itinerant electrons with clear signatures in magnetotransport measurements. The magnetic state is also coupled dynamically to the lattice and can be reversibly tuned by applying local external forces. As a result, this study raises the possibility of designing nanoscale devices based on domain walls where strain-tunable ferroelectric, ferroelastic and ferromagnetic orders may coexist.},
doi = {10.1038/s41567-018-0363-x},
journal = {Nature Physics},
number = 3,
volume = 15,
place = {United States},
year = {2018},
month = {12}
}

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