Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

Carolin Schmitz-Antoniak; Detlef Schmitz; Pavel Borisov; Frank M. F. de Groot; Sven Stienen; Anne Warland; Bernhard Krumme; Ralf Feyerherm; Esther Dudzik; Wolfgang Kleemann; Heiko Wende

doi:10.1038/ncomms3051

Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

Carolin Schmitz-Antoniak^*, Detlef Schmitz, Pavel Borisov, Frank M. F. de Groot, Sven Stienen, Anne Warland, Bernhard Krumme, Ralf Feyerherm, Esther Dudzik, Wolfgang Kleemann, Heiko Wende

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

Abstract

Ferrimagnetic CoFe2O4 nanopillars embedded in a ferroelectric BaTiO3 matrix are an example for a two-phase magnetoelectrically coupled system. They operate at room temperature and are free of any resource-critical rare-earth element, which makes them interesting for potential applications. Prior studies succeeded in showing strain-mediated coupling between the two subsystems. In particular, the electric properties can be tuned by magnetic fields and the magnetic properties by electric fields. Here we take the analysis of the coupling to a new level utilizing soft X-ray absorption spectroscopy and its associated linear dichroism. We demonstrate that an in-plane magnetic field breaks the tetragonal symmetry of the (1,3)-type CoFe2O4/BaTiO3 structures and discuss it in terms of off-diagonal magnetostrictive-piezoelectric coupling. This coupling creates staggered in-plane components of the electric polarization, which are stable even at magnetic remanence due to hysteretic behaviour of structural changes in the BaTiO3 matrix. The competing mechanisms of clamping and relaxation effects are discussed in detail.

Original language	English
Article number	2051
Pages (from-to)	1-8
Number of pages	8
Journal	Nature Communications [E]
Volume	4
DOIs	https://doi.org/10.1038/ncomms3051
Publication status	Published - Jun 2013

Funding

We would like to thank the HZB-BESSY II staff for their kind support during beamtimes. We gratefully acknowledge U. v. Horsten from the University of Duisburg-Essen for help in the structural pre-characterization. This work was funded by the BMBF (05 ES3XBA/5) and the DFG (SFB491).

Keywords

X-RAY-ABSORPTION
BATIO3-COFE2O4 NANOSTRUCTURES
SINGLE-CRYSTALS

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title = "Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields",

abstract = "Ferrimagnetic CoFe2O4 nanopillars embedded in a ferroelectric BaTiO3 matrix are an example for a two-phase magnetoelectrically coupled system. They operate at room temperature and are free of any resource-critical rare-earth element, which makes them interesting for potential applications. Prior studies succeeded in showing strain-mediated coupling between the two subsystems. In particular, the electric properties can be tuned by magnetic fields and the magnetic properties by electric fields. Here we take the analysis of the coupling to a new level utilizing soft X-ray absorption spectroscopy and its associated linear dichroism. We demonstrate that an in-plane magnetic field breaks the tetragonal symmetry of the (1,3)-type CoFe2O4/BaTiO3 structures and discuss it in terms of off-diagonal magnetostrictive-piezoelectric coupling. This coupling creates staggered in-plane components of the electric polarization, which are stable even at magnetic remanence due to hysteretic behaviour of structural changes in the BaTiO3 matrix. The competing mechanisms of clamping and relaxation effects are discussed in detail.",

keywords = "X-RAY-ABSORPTION, BATIO3-COFE2O4 NANOSTRUCTURES, SINGLE-CRYSTALS",

author = "Carolin Schmitz-Antoniak and Detlef Schmitz and Pavel Borisov and \{de Groot\}, \{Frank M. F.\} and Sven Stienen and Anne Warland and Bernhard Krumme and Ralf Feyerherm and Esther Dudzik and Wolfgang Kleemann and Heiko Wende",

year = "2013",

month = jun,

doi = "10.1038/ncomms3051",

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T1 - Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

AU - Schmitz-Antoniak, Carolin

AU - Schmitz, Detlef

AU - Borisov, Pavel

AU - de Groot, Frank M. F.

AU - Stienen, Sven

AU - Warland, Anne

AU - Krumme, Bernhard

AU - Feyerherm, Ralf

AU - Dudzik, Esther

AU - Kleemann, Wolfgang

AU - Wende, Heiko

PY - 2013/6

Y1 - 2013/6

N2 - Ferrimagnetic CoFe2O4 nanopillars embedded in a ferroelectric BaTiO3 matrix are an example for a two-phase magnetoelectrically coupled system. They operate at room temperature and are free of any resource-critical rare-earth element, which makes them interesting for potential applications. Prior studies succeeded in showing strain-mediated coupling between the two subsystems. In particular, the electric properties can be tuned by magnetic fields and the magnetic properties by electric fields. Here we take the analysis of the coupling to a new level utilizing soft X-ray absorption spectroscopy and its associated linear dichroism. We demonstrate that an in-plane magnetic field breaks the tetragonal symmetry of the (1,3)-type CoFe2O4/BaTiO3 structures and discuss it in terms of off-diagonal magnetostrictive-piezoelectric coupling. This coupling creates staggered in-plane components of the electric polarization, which are stable even at magnetic remanence due to hysteretic behaviour of structural changes in the BaTiO3 matrix. The competing mechanisms of clamping and relaxation effects are discussed in detail.

AB - Ferrimagnetic CoFe2O4 nanopillars embedded in a ferroelectric BaTiO3 matrix are an example for a two-phase magnetoelectrically coupled system. They operate at room temperature and are free of any resource-critical rare-earth element, which makes them interesting for potential applications. Prior studies succeeded in showing strain-mediated coupling between the two subsystems. In particular, the electric properties can be tuned by magnetic fields and the magnetic properties by electric fields. Here we take the analysis of the coupling to a new level utilizing soft X-ray absorption spectroscopy and its associated linear dichroism. We demonstrate that an in-plane magnetic field breaks the tetragonal symmetry of the (1,3)-type CoFe2O4/BaTiO3 structures and discuss it in terms of off-diagonal magnetostrictive-piezoelectric coupling. This coupling creates staggered in-plane components of the electric polarization, which are stable even at magnetic remanence due to hysteretic behaviour of structural changes in the BaTiO3 matrix. The competing mechanisms of clamping and relaxation effects are discussed in detail.

KW - X-RAY-ABSORPTION

KW - BATIO3-COFE2O4 NANOSTRUCTURES

KW - SINGLE-CRYSTALS

U2 - 10.1038/ncomms3051

DO - 10.1038/ncomms3051

M3 - Article

SN - 2041-1723

VL - 4

SP - 1

EP - 8

JO - Nature Communications [E]

JF - Nature Communications [E]

M1 - 2051

ER -

Electric in-plane polarization in multiferroic CoFe2O4/BaTiO3 nanocomposite tuned by magnetic fields

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