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Title: Giant reversible anisotropy changes at room temperature in a (La,Sr)MnO 3/Pb(Mg,Nb,Ti)O 3 magneto-electric heterostructure

Abstract

In a model artificial multiferroic system consisting of a (011)-oriented ferroelectric Pb(Mg,Nb,Ti)O 3 substrate intimately coupled to an epitaxial ferromagnetic (La,Sr)MnO 3 film, electric field pulse sequences of less than 6 kV/cm induce large, reversible, and bistable remanent strains. The magnetic anisotropy symmetry reversibly switches from a highly anisotropic two-fold state to a more isotropic one, with concomitant changes in resistivity. Anisotropy changes at the scale of a single ferromagnetic domain were measured using X-ray microscopy, with electric-field dependent magnetic domain reversal showing that the energy barrier for magnetization reversal is drastically lowered. Free energy calculations confirm this barrier lowering by up to 70% due to the anisotropic strain changes generated by the substrate. Thus, we demonstrate that an electric field pulse can be used to 'set' and 'reset' the magnetic anisotropy orientation and resistive state in the film, as well as to lower the magnetization reversal barrier, showing a promising route towards electric-field manipulation of multifunctional nanostructures at room temperature.

Authors:
 [1];  [2];  [3];  [3];  [2];  [1]
  1. Univ. of California, Davis, CA (United States). Dept. of Materials Science and Engineering
  2. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1379390
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; electronic devices; ferroelectronics and multiferroics; magnetic properties and materials

Citation Formats

Chopdekar, Rajesh Vilas, Buzzi, Michele, Jenkins, Catherine, Arenholz, Elke, Nolting, Frithjof, and Takamura, Yayoi. Giant reversible anisotropy changes at room temperature in a (La,Sr)MnO3/Pb(Mg,Nb,Ti)O3 magneto-electric heterostructure. United States: N. p., 2016. Web. doi:10.1038/srep27501.
Chopdekar, Rajesh Vilas, Buzzi, Michele, Jenkins, Catherine, Arenholz, Elke, Nolting, Frithjof, & Takamura, Yayoi. Giant reversible anisotropy changes at room temperature in a (La,Sr)MnO3/Pb(Mg,Nb,Ti)O3 magneto-electric heterostructure. United States. doi:10.1038/srep27501.
Chopdekar, Rajesh Vilas, Buzzi, Michele, Jenkins, Catherine, Arenholz, Elke, Nolting, Frithjof, and Takamura, Yayoi. Wed . "Giant reversible anisotropy changes at room temperature in a (La,Sr)MnO3/Pb(Mg,Nb,Ti)O3 magneto-electric heterostructure". United States. doi:10.1038/srep27501. https://www.osti.gov/servlets/purl/1379390.
@article{osti_1379390,
title = {Giant reversible anisotropy changes at room temperature in a (La,Sr)MnO3/Pb(Mg,Nb,Ti)O3 magneto-electric heterostructure},
author = {Chopdekar, Rajesh Vilas and Buzzi, Michele and Jenkins, Catherine and Arenholz, Elke and Nolting, Frithjof and Takamura, Yayoi},
abstractNote = {In a model artificial multiferroic system consisting of a (011)-oriented ferroelectric Pb(Mg,Nb,Ti)O 3 substrate intimately coupled to an epitaxial ferromagnetic (La,Sr)MnO 3 film, electric field pulse sequences of less than 6 kV/cm induce large, reversible, and bistable remanent strains. The magnetic anisotropy symmetry reversibly switches from a highly anisotropic two-fold state to a more isotropic one, with concomitant changes in resistivity. Anisotropy changes at the scale of a single ferromagnetic domain were measured using X-ray microscopy, with electric-field dependent magnetic domain reversal showing that the energy barrier for magnetization reversal is drastically lowered. Free energy calculations confirm this barrier lowering by up to 70% due to the anisotropic strain changes generated by the substrate. Thus, we demonstrate that an electric field pulse can be used to 'set' and 'reset' the magnetic anisotropy orientation and resistive state in the film, as well as to lower the magnetization reversal barrier, showing a promising route towards electric-field manipulation of multifunctional nanostructures at room temperature.},
doi = {10.1038/srep27501},
journal = {Scientific Reports},
number = 1,
volume = 6,
place = {United States},
year = {Wed Jun 08 00:00:00 EDT 2016},
month = {Wed Jun 08 00:00:00 EDT 2016}
}

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Works referenced in this record:

Multiferroics progress and prospects in thin films
journal, January 2007

  • Ramesh, R.; Spaldin, Nicola A.
  • Nature Materials, Vol. 6, Issue 1, p. 21-29
  • DOI: 10.1038/nmat1805