Controlled mechnical modification of manganite surface with nanoscale resolution

Simon J. Kelly; Yunseok Kim; Eugene Eliseev; Anna Morozovska; Stephen Jesse; Michael D. Biegalski; J. F. Mitchell; H. Zheng; J. Aarts; Inrok Hwang; Sungtaek Oh; Jin Sik Choi; Taekjib Choi; Bae Ho Park; Sergei V. Kalinin; Peter Maksymovych

doi:10.1088/0957-4484/25/47/475302

Controlled mechnical modification of manganite surface with nanoscale resolution

Simon J. Kelly, Yunseok Kim, Eugene Eliseev, Anna Morozovska, Stephen Jesse, Michael D. Biegalski, J. F. Mitchell, H. Zheng, J. Aarts, Inrok Hwang, Sungtaek Oh, Jin Sik Choi, Taekjib Choi, Bae Ho Park, Sergei V. Kalinin, Peter Maksymovych

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

7 Scopus citations

Abstract

We investigated the surfaces of magnetoresistive manganites, La_1-xCa_xMnO₃ and La_2-2xSr_1+2xMn₂O₇, using a combination of ultrahigh vacuum conductive, electrostatic and magnetic force microscopy methods. Scanning as-grown film with a metal tip, even with zero applied bias, was found to modify the surface electronic properties such that in subsequent scans, the conductivity is reduced below the noise level of conductive probe microscopy. Scanned areas also reveal a reduced contact potential difference relative to the pristine surface by ∼0.3 eV. We propose that contact-pressure of the tip modifies the electrochemical potential of oxygen vacancies via the Vegard effect, causing vacancy motion and concomitant changes of the electronic properties.

Original language	English
Article number	475302
Journal	Nanotechnology
Volume	25
Issue number	47
DOIs	https://doi.org/10.1088/0957-4484/25/47/475302
State	Published - Nov 28 2014

Keywords

Vegard
manganite
patterning
pressure
vacancy

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10.1088/0957-4484/25/47/475302

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Kelly, S. J., Kim, Y., Eliseev, E., Morozovska, A., Jesse, S., Biegalski, M. D., Mitchell, J. F., Zheng, H., Aarts, J., Hwang, I., Oh, S., Sik Choi, J., Choi, T., Ho Park, B., Kalinin, S. V., & Maksymovych, P. (2014). Controlled mechnical modification of manganite surface with nanoscale resolution. Nanotechnology, 25(47), Article 475302. https://doi.org/10.1088/0957-4484/25/47/475302

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title = "Controlled mechnical modification of manganite surface with nanoscale resolution",

abstract = "We investigated the surfaces of magnetoresistive manganites, La1-xCaxMnO3 and La2-2xSr1+2xMn2O7, using a combination of ultrahigh vacuum conductive, electrostatic and magnetic force microscopy methods. Scanning as-grown film with a metal tip, even with zero applied bias, was found to modify the surface electronic properties such that in subsequent scans, the conductivity is reduced below the noise level of conductive probe microscopy. Scanned areas also reveal a reduced contact potential difference relative to the pristine surface by ∼0.3 eV. We propose that contact-pressure of the tip modifies the electrochemical potential of oxygen vacancies via the Vegard effect, causing vacancy motion and concomitant changes of the electronic properties.",

keywords = "Vegard, manganite, patterning, pressure, vacancy",

author = "Kelly, {Simon J.} and Yunseok Kim and Eugene Eliseev and Anna Morozovska and Stephen Jesse and Biegalski, {Michael D.} and Mitchell, {J. F.} and H. Zheng and J. Aarts and Inrok Hwang and Sungtaek Oh and {Sik Choi}, Jin and Taekjib Choi and {Ho Park}, Bae and Kalinin, {Sergei V.} and Peter Maksymovych",

note = "Publisher Copyright: {\textcopyright} 2014 IOP Publishing Ltd.",

year = "2014",

month = nov,

day = "28",

doi = "10.1088/0957-4484/25/47/475302",

language = "English",

volume = "25",

journal = "Nanotechnology",

issn = "0957-4484",

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T1 - Controlled mechnical modification of manganite surface with nanoscale resolution

AU - Kelly, Simon J.

AU - Kim, Yunseok

AU - Eliseev, Eugene

AU - Morozovska, Anna

AU - Jesse, Stephen

AU - Biegalski, Michael D.

AU - Mitchell, J. F.

AU - Zheng, H.

AU - Aarts, J.

AU - Hwang, Inrok

AU - Oh, Sungtaek

AU - Sik Choi, Jin

AU - Choi, Taekjib

AU - Ho Park, Bae

AU - Kalinin, Sergei V.

AU - Maksymovych, Peter

PY - 2014/11/28

Y1 - 2014/11/28

N2 - We investigated the surfaces of magnetoresistive manganites, La1-xCaxMnO3 and La2-2xSr1+2xMn2O7, using a combination of ultrahigh vacuum conductive, electrostatic and magnetic force microscopy methods. Scanning as-grown film with a metal tip, even with zero applied bias, was found to modify the surface electronic properties such that in subsequent scans, the conductivity is reduced below the noise level of conductive probe microscopy. Scanned areas also reveal a reduced contact potential difference relative to the pristine surface by ∼0.3 eV. We propose that contact-pressure of the tip modifies the electrochemical potential of oxygen vacancies via the Vegard effect, causing vacancy motion and concomitant changes of the electronic properties.

AB - We investigated the surfaces of magnetoresistive manganites, La1-xCaxMnO3 and La2-2xSr1+2xMn2O7, using a combination of ultrahigh vacuum conductive, electrostatic and magnetic force microscopy methods. Scanning as-grown film with a metal tip, even with zero applied bias, was found to modify the surface electronic properties such that in subsequent scans, the conductivity is reduced below the noise level of conductive probe microscopy. Scanned areas also reveal a reduced contact potential difference relative to the pristine surface by ∼0.3 eV. We propose that contact-pressure of the tip modifies the electrochemical potential of oxygen vacancies via the Vegard effect, causing vacancy motion and concomitant changes of the electronic properties.

KW - Vegard

KW - manganite

KW - patterning

KW - pressure

KW - vacancy

UR - http://www.scopus.com/inward/record.url?scp=84909952019&partnerID=8YFLogxK

U2 - 10.1088/0957-4484/25/47/475302

DO - 10.1088/0957-4484/25/47/475302

M3 - Article

AN - SCOPUS:84909952019

SN - 0957-4484

VL - 25

JO - Nanotechnology

JF - Nanotechnology

IS - 47

M1 - 475302

ER -

Controlled mechnical modification of manganite surface with nanoscale resolution

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