Electrochemical potential gradients in Pb(Zr,Ti)O3 thin films

M. Brazier; S. Mansour; M. McElfresh

Electrochemical potential gradients in Pb(Zr,Ti)O₃ thin films

M. Brazier^*, S. Mansour, M. McElfresh

^*Corresponding author for this work

Purdue University

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

Thin film PbZr_0.55Ti_0.45O₃ (PZT) capacitors were observed to develop a dc voltage offset when driven with an ac applied electric field. This voltage offset displayed a strong dependence on the ambient oxygen partial pressure, pO₂, of the atmosphere above the film, in addition to applied electric field and temperature dependencies. A scenario is proposed wherein a chemical potential gradient is established in the film, the magnitude of which is determined by the ambient pO₂. The subsequent redistribution of oxygen vacancies is thought to create the observed voltage offset. This hypothesis was supported by the observation of similar voltage offsets in compositionally graded PZT films. This effect shows promise for novel low-temperature oxygen sensing applications.

Original language	English
Pages (from-to)	507-510
Number of pages	4
Journal	Materials Research Society Symposium - Proceedings
Volume	541
Publication status	Published - 1999
Externally published	Yes
Event	Proceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' - Boston, MA, USA Duration: 30 Nov 1998 → 3 Dec 1998

Cite this

@article{8d3d9f2b725e49899850a058a12504e5,

title = "Electrochemical potential gradients in Pb(Zr,Ti)O3 thin films",

abstract = "Thin film PbZr0.55Ti0.45O3 (PZT) capacitors were observed to develop a dc voltage offset when driven with an ac applied electric field. This voltage offset displayed a strong dependence on the ambient oxygen partial pressure, pO2, of the atmosphere above the film, in addition to applied electric field and temperature dependencies. A scenario is proposed wherein a chemical potential gradient is established in the film, the magnitude of which is determined by the ambient pO2. The subsequent redistribution of oxygen vacancies is thought to create the observed voltage offset. This hypothesis was supported by the observation of similar voltage offsets in compositionally graded PZT films. This effect shows promise for novel low-temperature oxygen sensing applications.",

author = "M. Brazier and S. Mansour and M. McElfresh",

year = "1999",

language = "English",

volume = "541",

pages = "507--510",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

publisher = "Materials Research Society",

note = "Proceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998' ; Conference date: 30-11-1998 Through 03-12-1998",

}

TY - JOUR

T1 - Electrochemical potential gradients in Pb(Zr,Ti)O3 thin films

AU - Brazier, M.

AU - Mansour, S.

AU - McElfresh, M.

PY - 1999

Y1 - 1999

N2 - Thin film PbZr0.55Ti0.45O3 (PZT) capacitors were observed to develop a dc voltage offset when driven with an ac applied electric field. This voltage offset displayed a strong dependence on the ambient oxygen partial pressure, pO2, of the atmosphere above the film, in addition to applied electric field and temperature dependencies. A scenario is proposed wherein a chemical potential gradient is established in the film, the magnitude of which is determined by the ambient pO2. The subsequent redistribution of oxygen vacancies is thought to create the observed voltage offset. This hypothesis was supported by the observation of similar voltage offsets in compositionally graded PZT films. This effect shows promise for novel low-temperature oxygen sensing applications.

AB - Thin film PbZr0.55Ti0.45O3 (PZT) capacitors were observed to develop a dc voltage offset when driven with an ac applied electric field. This voltage offset displayed a strong dependence on the ambient oxygen partial pressure, pO2, of the atmosphere above the film, in addition to applied electric field and temperature dependencies. A scenario is proposed wherein a chemical potential gradient is established in the film, the magnitude of which is determined by the ambient pO2. The subsequent redistribution of oxygen vacancies is thought to create the observed voltage offset. This hypothesis was supported by the observation of similar voltage offsets in compositionally graded PZT films. This effect shows promise for novel low-temperature oxygen sensing applications.

UR - http://www.scopus.com/inward/record.url?scp=0032592297&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0032592297

SN - 0272-9172

VL - 541

SP - 507

EP - 510

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Proceedings of the 1998 MRS Fall Meeting - The Symposium 'Advanced Catalytic Materials-1998'

Y2 - 30 November 1998 through 3 December 1998

ER -

Electrochemical potential gradients in Pb(Zr,Ti)O₃ thin films

Abstract

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