We present an overview of our results demonstrating a large, charge-driven, magnetoelectric coupling in epitaxial Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 (PZT/LSMO) multiferroic heterostructures. Measurements of the magnetization as a function of temperature and applied electric field using magneto-optic Kerr effect magnetometry show a large change in the magnetic critical temperature and magnetic moment of the LSMO layer for the two states of the PZT ferroelectric polarization, which modulates the charge-carrier concentration at the LSMO interface. Near-edge x-ray absorption spectroscopy measurements show directly that the valence state of Mn is modulated by the PZT polarization state, demonstrating that the magnetoelectric coupling in these PZT/LSMO multiferroic heterostructures is purely electronic in origin. From the combined spectroscopic, magnetic, and electric characterization, we conclude that both the interfacial spin state and spin configuration are modulated electrostatically. This ability of controlling spin by means of electric fields opens a new venue for the development of novel spin-based devices.
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1 April 2011
PROCEEDINGS OF THE 55TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS
14-18 November 2010
Atlanta, Georgia
Research Article|
Magnetism and Magnetic Materials|
March 21 2011
Control of magnetism in Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 multiferroic heterostructures (invited)
C. A. F. Vaz;
C. A. F. Vaz
a)
1Department of Applied Physics,
Yale University, New Haven
, Connecticut 06520, USA
2Center for Research on Interface Structures and Phenomena (CRISP),
Yale University, New Haven
, Connecticut 06520, USA
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J. Hoffman;
J. Hoffman
1Department of Applied Physics,
Yale University, New Haven
, Connecticut 06520, USA
2Center for Research on Interface Structures and Phenomena (CRISP),
Yale University, New Haven
, Connecticut 06520, USA
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Y. Segal;
Y. Segal
1Department of Applied Physics,
Yale University, New Haven
, Connecticut 06520, USA
2Center for Research on Interface Structures and Phenomena (CRISP),
Yale University, New Haven
, Connecticut 06520, USA
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M. S. J. Marshall;
M. S. J. Marshall
1Department of Applied Physics,
Yale University, New Haven
, Connecticut 06520, USA
2Center for Research on Interface Structures and Phenomena (CRISP),
Yale University, New Haven
, Connecticut 06520, USA
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J. W. Reiner;
J. W. Reiner
1Department of Applied Physics,
Yale University, New Haven
, Connecticut 06520, USA
2Center for Research on Interface Structures and Phenomena (CRISP),
Yale University, New Haven
, Connecticut 06520, USA
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Z. Zhang;
Z. Zhang
3Advanced Photon Source,
Argonne National Laboratory
, Argonne, Illinois 60439, USA
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R. D. Grober;
R. D. Grober
3Advanced Photon Source,
Argonne National Laboratory
, Argonne, Illinois 60439, USA
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F. J. Walker;
F. J. Walker
3Advanced Photon Source,
Argonne National Laboratory
, Argonne, Illinois 60439, USA
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C. H. Ahn
C. H. Ahn
3Advanced Photon Source,
Argonne National Laboratory
, Argonne, Illinois 60439, USA
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C. A. F. Vaz
1,2,a)
J. Hoffman
1,2
Y. Segal
1,2
M. S. J. Marshall
1,2
J. W. Reiner
1,2
Z. Zhang
3
R. D. Grober
3
F. J. Walker
3
C. H. Ahn
3
1Department of Applied Physics,
Yale University, New Haven
, Connecticut 06520, USA
2Center for Research on Interface Structures and Phenomena (CRISP),
Yale University, New Haven
, Connecticut 06520, USA
3Advanced Photon Source,
Argonne National Laboratory
, Argonne, Illinois 60439, USA
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
J. Appl. Phys. 109, 07D905 (2011)
Article history
Received:
October 13 2010
Accepted:
November 08 2010
Citation
C. A. F. Vaz, J. Hoffman, Y. Segal, M. S. J. Marshall, J. W. Reiner, Z. Zhang, R. D. Grober, F. J. Walker, C. H. Ahn; Control of magnetism in Pb(Zr0.2Ti0.8)O3/La0.8Sr0.2MnO3 multiferroic heterostructures (invited). J. Appl. Phys. 1 April 2011; 109 (7): 07D905. https://doi.org/10.1063/1.3540694
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