Nonlinear Phenomena in Multiferroic Nanocapacitors: Joule Heating and Electromechanical Effects

被引：76

作者：

Kim, Yunseok ^{[1
]}

Kumar, Amit ^{[1
]}

Tselev, Alexander ^{[1
]}

Kravchenko, Ivan I. ^{[1
]}

Han, Hee ^{[2
]}

Vrejoiu, Ionela ^{[3
]}

Lee, Woo ^{[2
]}

Hesse, Dietrich ^{[3
]}

Alexe, Marin ^{[3
]}

Kalinin, Sergei V. ^{[1
]}

Jesset, Stephen ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA

[2] Korea Res Inst Stand & Sci, Taejon 305340, South Korea

[3] Max Planck Inst Microstruct Phys, D-06120 Halle, Saale, Germany

来源：

ACS NANO | 2011年 / 5卷 / 11期

关键词：

multiferroic nanocapacitor; conduction; nonlinear response; Joule heating; PFM; FATIGUE BEHAVIOR; LEAKAGE CURRENT; DOMAIN-WALLS; THIN-FILMS; TEMPERATURE; CONDUCTION; FERROELECTRICS; CAPACITORS; DYNAMICS;

D O I：

10.1021/nn203342v

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

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.

引用

页码：9104 / 9112

页数：9

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