Vacancy defects in (Pb, La)(Zr, Ti)O{sub 3} capacitors observed by positron annihilation

doi:https://doi.org/10.1063/1.121820

Title: Vacancy defects in (Pb, La)(Zr, Ti)O{sub 3} capacitors observed by positron annihilation

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Abstract

A study of vacancy-related defects in ferroelectric capacitors was performed using a variable energy positron beam (VEPB). Heterostructures of (Pb{sub 0.9}La{sub 0.1})(Zr{sub 0.2}Ti{sub 0.8})O{sub 3} (PLZT) ferroelectric with La{sub 0.5}Sr{sub 0.5}CoO{sub 3} (LSCO) electrodes were deposited by pulsed laser deposition and the effects of oxygen deficiency studied using structures grown with 760 and 1{times}10{sup {minus}5}thinspTorr oxygen. The VEPB depth profile showed an increase in vacancy-related defects with increased oxygen nonstoichiometry. A study of LSCO and PLZT thin films was also performed. The formation of vacancy clusters in the LSCO top electrode, and V{sub Pb}{minus}V{sub O} defects in the PLZT layer, with increased oxygen deficiency is inferred. {copyright} {ital 1998 American Institute of Physics.}

Authors:

Keeble, D J ^[1]; Nielsen, B; Krishnan, A; Lynn, K G ^[2]; Madhukar, S; Ramesh, R ^[3]; Young, C F ^[4]

Carnegie Laboratory of Physics, University of Dundee, Dundee DD1 4HN (United Kingdom)
Division of Materials Science, Brookhaven National Laboratory, Upton, New York 11793 (United States)
Department of Materials Science and Nuclear Engineering, University of Maryland, College Park, Maryland 20742 (United States)
Army Research Laboratory, Adelphi, Maryland 20783 (United States)

Publication Date:: 1998-07-01

OSTI Identifier:: 639045

Resource Type:: Journal Article

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 73; Journal Issue: 3; Other Information: PBD: Jul 1998

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 66 PHYSICS; LEAD COMPOUNDS; LANTHANUM COMPOUNDS; STOICHIOMETRY; CAPACITORS; FERROELECTRIC MATERIALS; PZT; LANTHANUM ADDITIONS; ELECTRODES; VACANCIES; CRYSTAL DEFECTS; POSITRONS; ANNIHILATION; THIN FILMS

Citation Formats


                    Keeble, D J, Nielsen, B, Krishnan, A, Lynn, K G, Madhukar, S, Ramesh, R, and Young, C F. Vacancy defects in (Pb, La)(Zr, Ti)O{sub 3} capacitors observed by positron annihilation.  United States: N. p., 1998. 
        Web.  doi:10.1063/1.121820.

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                    Keeble, D J, Nielsen, B, Krishnan, A, Lynn, K G, Madhukar, S, Ramesh, R, & Young, C F. Vacancy defects in (Pb, La)(Zr, Ti)O{sub 3} capacitors observed by positron annihilation.  United States.  https://doi.org/10.1063/1.121820

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                    Keeble, D J, Nielsen, B, Krishnan, A, Lynn, K G, Madhukar, S, Ramesh, R, and Young, C F. Wed .  
        "Vacancy defects in (Pb, La)(Zr, Ti)O{sub 3} capacitors observed by positron annihilation".  United States.  https://doi.org/10.1063/1.121820.

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@article{osti_639045,

  title        = {Vacancy defects in (Pb, La)(Zr, Ti)O{sub 3} capacitors observed by positron annihilation},

  author       = {Keeble, D J and Nielsen, B and Krishnan, A and Lynn, K G and Madhukar, S and Ramesh, R and Young, C F},

  abstractNote = {A study of vacancy-related defects in ferroelectric capacitors was performed using a variable energy positron beam (VEPB). Heterostructures of (Pb{sub 0.9}La{sub 0.1})(Zr{sub 0.2}Ti{sub 0.8})O{sub 3} (PLZT) ferroelectric with La{sub 0.5}Sr{sub 0.5}CoO{sub 3} (LSCO) electrodes were deposited by pulsed laser deposition and the effects of oxygen deficiency studied using structures grown with 760 and 1{times}10{sup {minus}5}thinspTorr oxygen. The VEPB depth profile showed an increase in vacancy-related defects with increased oxygen nonstoichiometry. A study of LSCO and PLZT thin films was also performed. The formation of vacancy clusters in the LSCO top electrode, and V{sub Pb}{minus}V{sub O} defects in the PLZT layer, with increased oxygen deficiency is inferred. {copyright} {ital 1998 American Institute of Physics.}},

  doi          = {10.1063/1.121820},

  url          = {https://www.osti.gov/biblio/639045},
  journal      = {Applied Physics Letters},
number       = 3,

  volume       = 73,

  place        = {United States},

  year         = {1998},

  month        = {7}

}

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