Nonlinear phenomena in multiferroic nanocapacitors: Joule heating and electromechanical effects

Yunseok Kim; Amit Kumar; Alexander Tselev; Ivan I. Kravchenko; Hee Han; Ionela Vrejoiu; Woo Lee; Dietrich Hesse; Marin Alexe; Sergei V. Kalinin; Stephen Jesse

doi:10.1021/nn203342v

Nonlinear phenomena in multiferroic nanocapacitors: Joule heating and electromechanical effects

Yunseok Kim, Amit Kumar, Alexander Tselev, Ivan I. Kravchenko, Hee Han, Ionela Vrejoiu, Woo Lee, Dietrich Hesse, Marin Alexe, Sergei V. Kalinin, Stephen Jesse

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

72 Scopus citations

Abstract

We demonstrate an approach for probing nonlinear electromechanical responses in BiFeO₃ thin film nanocapacitors using half-harmonic band excitation piezoresponse force microscopy (PFM). Nonlinear PFM images of nanocapacitor arrays show clearly visible clusters of capacitors associated with variations of local leakage current through the BiFeO₃ film. Strain spectroscopy measurements and finite element modeling point to significance of the Joule heating and show that the thermal effects caused by the Joule heating can provide nontrivial contributions to the nonlinear electromechanical responses in ferroic nanostructures. This approach can be further extended to unambiguous mapping of electrostatic signal contributions to PFM and related techniques.

Original language	English
Pages (from-to)	9104-9112
Number of pages	9
Journal	ACS Nano
Volume	5
Issue number	11
DOIs	https://doi.org/10.1021/nn203342v
State	Published - Nov 22 2011

Keywords

Joule heating
PFM
conduction
multiferroic nanocapacitor
nonlinear response

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10.1021/nn203342v

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abstract = "We demonstrate an approach for probing nonlinear electromechanical responses in BiFeO3 thin film nanocapacitors using half-harmonic band excitation piezoresponse force microscopy (PFM). Nonlinear PFM images of nanocapacitor arrays show clearly visible clusters of capacitors associated with variations of local leakage current through the BiFeO3 film. Strain spectroscopy measurements and finite element modeling point to significance of the Joule heating and show that the thermal effects caused by the Joule heating can provide nontrivial contributions to the nonlinear electromechanical responses in ferroic nanostructures. This approach can be further extended to unambiguous mapping of electrostatic signal contributions to PFM and related techniques.",

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T1 - Nonlinear phenomena in multiferroic nanocapacitors

T2 - Joule heating and electromechanical effects

AU - Kim, Yunseok

AU - Kumar, Amit

AU - Tselev, Alexander

AU - Kravchenko, Ivan I.

AU - Han, Hee

AU - Vrejoiu, Ionela

AU - Lee, Woo

AU - Hesse, Dietrich

AU - Alexe, Marin

AU - Kalinin, Sergei V.

AU - Jesse, Stephen

PY - 2011/11/22

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N2 - We demonstrate an approach for probing nonlinear electromechanical responses in BiFeO3 thin film nanocapacitors using half-harmonic band excitation piezoresponse force microscopy (PFM). Nonlinear PFM images of nanocapacitor arrays show clearly visible clusters of capacitors associated with variations of local leakage current through the BiFeO3 film. Strain spectroscopy measurements and finite element modeling point to significance of the Joule heating and show that the thermal effects caused by the Joule heating can provide nontrivial contributions to the nonlinear electromechanical responses in ferroic nanostructures. This approach can be further extended to unambiguous mapping of electrostatic signal contributions to PFM and related techniques.

AB - We demonstrate an approach for probing nonlinear electromechanical responses in BiFeO3 thin film nanocapacitors using half-harmonic band excitation piezoresponse force microscopy (PFM). Nonlinear PFM images of nanocapacitor arrays show clearly visible clusters of capacitors associated with variations of local leakage current through the BiFeO3 film. Strain spectroscopy measurements and finite element modeling point to significance of the Joule heating and show that the thermal effects caused by the Joule heating can provide nontrivial contributions to the nonlinear electromechanical responses in ferroic nanostructures. This approach can be further extended to unambiguous mapping of electrostatic signal contributions to PFM and related techniques.

KW - Joule heating

KW - PFM

KW - conduction

KW - multiferroic nanocapacitor

KW - nonlinear response

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Nonlinear phenomena in multiferroic nanocapacitors: Joule heating and electromechanical effects

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