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Correlative multimodal probing of ionically-mediated electromechanical phenomena in simple oxides.

Kim Y, Strelcov E, Hwang IR, Choi T, Park BH, Jesse S, Kalinin SV - Sci Rep (2013)

Bottom Line: The local interplay between the ionic and electronic transport in NiO is explored using correlative imaging by first-order reversal curve measurements in current-voltage and electrochemical strain microscopy.Electronic current and electromechanical response are observed in reversible and electroforming regime.These studies provide insight into local mechanisms of electroresistive phenomena in NiO and establish universal method to study interplay between the ionic and electronic transport and electrochemical transformations in mixed electronic-ionic conductors.

View Article: PubMed Central - PubMed

Affiliation: 1] The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 [2] School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, Republic of Korea.

ABSTRACT
The local interplay between the ionic and electronic transport in NiO is explored using correlative imaging by first-order reversal curve measurements in current-voltage and electrochemical strain microscopy. Electronic current and electromechanical response are observed in reversible and electroforming regime. These studies provide insight into local mechanisms of electroresistive phenomena in NiO and establish universal method to study interplay between the ionic and electronic transport and electrochemical transformations in mixed electronic-ionic conductors.

No MeSH data available.


Related in: MedlinePlus

Spatial maps of (a, d) negative I-V loop area, (b, e) positive I-V loop area, and (c, f) ESM loop area for (a–c) 2 V and (d–f) 14 V, respectively. Correlation between ESM loop area and I-V loop area for (g) negative and (h) positive biases.
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f6: Spatial maps of (a, d) negative I-V loop area, (b, e) positive I-V loop area, and (c, f) ESM loop area for (a–c) 2 V and (d–f) 14 V, respectively. Correlation between ESM loop area and I-V loop area for (g) negative and (h) positive biases.

Mentions: The corresponding hysteresis loop area maps are shown in Figure 6. The clear spatially correlated features are visible in both ESM and I-V loop area maps. However, in this case the correlation between ESM and I-V behavior has almost disappeared. We attribute this behavior to the forming process in NiO. For intermediate biases, the oxygen vacancies accumulate below the tip, giving rise to large ESM responses and pronounced hysteresis in I-V and ESM loops. However, the system remains in the non-conductive state. On further bias increase, the nucleation of metallic phase occurs, with associated increase of electronic conductivity and decrease of ionic mobility.


Correlative multimodal probing of ionically-mediated electromechanical phenomena in simple oxides.

Kim Y, Strelcov E, Hwang IR, Choi T, Park BH, Jesse S, Kalinin SV - Sci Rep (2013)

Spatial maps of (a, d) negative I-V loop area, (b, e) positive I-V loop area, and (c, f) ESM loop area for (a–c) 2 V and (d–f) 14 V, respectively. Correlation between ESM loop area and I-V loop area for (g) negative and (h) positive biases.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3795354&req=5

f6: Spatial maps of (a, d) negative I-V loop area, (b, e) positive I-V loop area, and (c, f) ESM loop area for (a–c) 2 V and (d–f) 14 V, respectively. Correlation between ESM loop area and I-V loop area for (g) negative and (h) positive biases.
Mentions: The corresponding hysteresis loop area maps are shown in Figure 6. The clear spatially correlated features are visible in both ESM and I-V loop area maps. However, in this case the correlation between ESM and I-V behavior has almost disappeared. We attribute this behavior to the forming process in NiO. For intermediate biases, the oxygen vacancies accumulate below the tip, giving rise to large ESM responses and pronounced hysteresis in I-V and ESM loops. However, the system remains in the non-conductive state. On further bias increase, the nucleation of metallic phase occurs, with associated increase of electronic conductivity and decrease of ionic mobility.

Bottom Line: The local interplay between the ionic and electronic transport in NiO is explored using correlative imaging by first-order reversal curve measurements in current-voltage and electrochemical strain microscopy.Electronic current and electromechanical response are observed in reversible and electroforming regime.These studies provide insight into local mechanisms of electroresistive phenomena in NiO and establish universal method to study interplay between the ionic and electronic transport and electrochemical transformations in mixed electronic-ionic conductors.

View Article: PubMed Central - PubMed

Affiliation: 1] The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 [2] School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, Republic of Korea.

ABSTRACT
The local interplay between the ionic and electronic transport in NiO is explored using correlative imaging by first-order reversal curve measurements in current-voltage and electrochemical strain microscopy. Electronic current and electromechanical response are observed in reversible and electroforming regime. These studies provide insight into local mechanisms of electroresistive phenomena in NiO and establish universal method to study interplay between the ionic and electronic transport and electrochemical transformations in mixed electronic-ionic conductors.

No MeSH data available.


Related in: MedlinePlus