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Title: Enhancing interfacial magnetization with a ferroelectric

Abstract

Ferroelectric control of interfacial magnetism has attracted much attention. However, the coupling of these two functionalities has not been understood well at the atomic scale. The lack of scientific progress is mainly due to the limited characterization methods by which the interface’s magnetic properties can be probed at an atomic level. In this paper, we use polarized neutron reflectometry to probe the evolution of the magnetic moment at interfaces in ferroelectric/strongly correlated oxide [PbZr 0.2Ti 0.8O 3/La 0.8Sr 0.2MnO 3(PZT/LSMO)] heterostructures. We find that the magnetization at the surfaces and interfaces of our LSMO films without PZT are always deteriorated and such magnetic deterioration can be greatly improved by interfacing with a strongly polar PZT film. Magnetoelectric coupling of magnetism and ferroelectric polarization was observed within a couple of nanometers of the interface via an increase in the LSMO surface magnetization to 4.0μ B/f.u., a value nearly 70% higher than the surface magnetization of our LSMO film without interfacing with a ferroelectric layer. We attribute this behavior to hole depletion driven by the ferroelectric polarization. Finally, these compelling results not only probe the presence of nanoscale magnetic suppression and its control by ferroelectrics, but also emphasize the importance of utilizingmore » probing techniques that can distinguish between bulk and interfacial phenomena.« less

Authors:
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Laboratory Directed Research and Development (LDRD) Program
Contributing Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
OSTI Identifier:
1340447
Alternate Identifier(s):
OSTI ID: 1333034; OSTI ID: 1355874
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 17; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Meyer, Tricia L., Herklotz, Andreas, Lauter, Valeria, Freeland, John W., Nichols, John, Guo, Er-Jia, Lee, Shinbuhm, Ward, T. Zac, Balke, Nina, Kalinin, Sergei V., Fitzsimmons, Michael R., and Lee, Ho Nyung. Enhancing interfacial magnetization with a ferroelectric. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.174432.
Meyer, Tricia L., Herklotz, Andreas, Lauter, Valeria, Freeland, John W., Nichols, John, Guo, Er-Jia, Lee, Shinbuhm, Ward, T. Zac, Balke, Nina, Kalinin, Sergei V., Fitzsimmons, Michael R., & Lee, Ho Nyung. Enhancing interfacial magnetization with a ferroelectric. United States. doi:10.1103/PhysRevB.94.174432.
Meyer, Tricia L., Herklotz, Andreas, Lauter, Valeria, Freeland, John W., Nichols, John, Guo, Er-Jia, Lee, Shinbuhm, Ward, T. Zac, Balke, Nina, Kalinin, Sergei V., Fitzsimmons, Michael R., and Lee, Ho Nyung. Mon . "Enhancing interfacial magnetization with a ferroelectric". United States. doi:10.1103/PhysRevB.94.174432. https://www.osti.gov/servlets/purl/1340447.
@article{osti_1340447,
title = {Enhancing interfacial magnetization with a ferroelectric},
author = {Meyer, Tricia L. and Herklotz, Andreas and Lauter, Valeria and Freeland, John W. and Nichols, John and Guo, Er-Jia and Lee, Shinbuhm and Ward, T. Zac and Balke, Nina and Kalinin, Sergei V. and Fitzsimmons, Michael R. and Lee, Ho Nyung},
abstractNote = {Ferroelectric control of interfacial magnetism has attracted much attention. However, the coupling of these two functionalities has not been understood well at the atomic scale. The lack of scientific progress is mainly due to the limited characterization methods by which the interface’s magnetic properties can be probed at an atomic level. In this paper, we use polarized neutron reflectometry to probe the evolution of the magnetic moment at interfaces in ferroelectric/strongly correlated oxide [PbZr0.2Ti0.8O3/La0.8Sr0.2MnO3(PZT/LSMO)] heterostructures. We find that the magnetization at the surfaces and interfaces of our LSMO films without PZT are always deteriorated and such magnetic deterioration can be greatly improved by interfacing with a strongly polar PZT film. Magnetoelectric coupling of magnetism and ferroelectric polarization was observed within a couple of nanometers of the interface via an increase in the LSMO surface magnetization to 4.0μB/f.u., a value nearly 70% higher than the surface magnetization of our LSMO film without interfacing with a ferroelectric layer. We attribute this behavior to hole depletion driven by the ferroelectric polarization. Finally, these compelling results not only probe the presence of nanoscale magnetic suppression and its control by ferroelectrics, but also emphasize the importance of utilizing probing techniques that can distinguish between bulk and interfacial phenomena.},
doi = {10.1103/PhysRevB.94.174432},
journal = {Physical Review B},
number = 17,
volume = 94,
place = {United States},
year = {Mon Nov 21 00:00:00 EST 2016},
month = {Mon Nov 21 00:00:00 EST 2016}
}

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Works referenced in this record:

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