Positive temperature coefficient of resistivity and negative differential resistivity in lead iron tunstate-lead zirconate titate

Ashok Kumar; Ram S. Katiyar; J. F. Scott

doi:10.1063/1.3138781

Positive temperature coefficient of resistivity and negative differential resistivity in lead iron tunstate-lead zirconate titate

Ashok Kumar^*, Ram S. Katiyar, J. F. Scott

^*Corresponding author for this work

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

Abstract

A tetragonal crystal of formula (PbFe(0.67)W(0.33)O(3))(0.2)(PbZr(0.53)Ti(0.47)O(3))(0.8) ("PFW/PZT") was recently found to exhibit ferroelectric switching via magnetic fields of H=0.5 T at room temperature [Kumar , arXiv:0812.3875v2]. In the present study we found that this material exhibits two other unusual properties: a positive temperature coefficient of resistivity (PTCR) and negative differential resistivity. These phenomena are often considered to be unrelated and PTCR usually results from grain boundary effects, but can be bulk [D. C. Sinclair and A. R. West, J. Appl. Phys. 66, 3850 (1989)]. Within the diffusion theory of Dawber and Scott [J. Phys. Condens. Mater. 16, L515 (2004)] they are necessarily related and we fitted the present data to their diffusion-limited model.

Original language	English
Article number	212903
Number of pages	3
Journal	Applied Physics Letters
Volume	94
Issue number	21
DOIs	https://doi.org/10.1063/1.3138781
Publication status	Published - 25 May 2009

Keywords

diffusion
electrical resistivity
ferroelectric switching
ferroelectric thin films
grain boundaries
lead compounds
THIN-FILMS
LIMITED CURRENT
ELECTRODES
CAPACITORS
EMISSION
PZT

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@article{329cf6655429412b9c1264e8f3c8ad00,

title = "Positive temperature coefficient of resistivity and negative differential resistivity in lead iron tunstate-lead zirconate titate",

abstract = "A tetragonal crystal of formula (PbFe(0.67)W(0.33)O(3))(0.2)(PbZr(0.53)Ti(0.47)O(3))(0.8) ({"}PFW/PZT{"}) was recently found to exhibit ferroelectric switching via magnetic fields of H=0.5 T at room temperature [Kumar , arXiv:0812.3875v2]. In the present study we found that this material exhibits two other unusual properties: a positive temperature coefficient of resistivity (PTCR) and negative differential resistivity. These phenomena are often considered to be unrelated and PTCR usually results from grain boundary effects, but can be bulk [D. C. Sinclair and A. R. West, J. Appl. Phys. 66, 3850 (1989)]. Within the diffusion theory of Dawber and Scott [J. Phys. Condens. Mater. 16, L515 (2004)] they are necessarily related and we fitted the present data to their diffusion-limited model.",

keywords = "diffusion, electrical resistivity, ferroelectric switching, ferroelectric thin films, grain boundaries, lead compounds, THIN-FILMS, LIMITED CURRENT, ELECTRODES, CAPACITORS, EMISSION, PZT",

author = "Ashok Kumar and Katiyar, {Ram S.} and Scott, {J. F.}",

year = "2009",

month = may,

day = "25",

doi = "10.1063/1.3138781",

language = "English",

volume = "94",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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T1 - Positive temperature coefficient of resistivity and negative differential resistivity in lead iron tunstate-lead zirconate titate

AU - Kumar, Ashok

AU - Katiyar, Ram S.

AU - Scott, J. F.

PY - 2009/5/25

Y1 - 2009/5/25

N2 - A tetragonal crystal of formula (PbFe(0.67)W(0.33)O(3))(0.2)(PbZr(0.53)Ti(0.47)O(3))(0.8) ("PFW/PZT") was recently found to exhibit ferroelectric switching via magnetic fields of H=0.5 T at room temperature [Kumar , arXiv:0812.3875v2]. In the present study we found that this material exhibits two other unusual properties: a positive temperature coefficient of resistivity (PTCR) and negative differential resistivity. These phenomena are often considered to be unrelated and PTCR usually results from grain boundary effects, but can be bulk [D. C. Sinclair and A. R. West, J. Appl. Phys. 66, 3850 (1989)]. Within the diffusion theory of Dawber and Scott [J. Phys. Condens. Mater. 16, L515 (2004)] they are necessarily related and we fitted the present data to their diffusion-limited model.

AB - A tetragonal crystal of formula (PbFe(0.67)W(0.33)O(3))(0.2)(PbZr(0.53)Ti(0.47)O(3))(0.8) ("PFW/PZT") was recently found to exhibit ferroelectric switching via magnetic fields of H=0.5 T at room temperature [Kumar , arXiv:0812.3875v2]. In the present study we found that this material exhibits two other unusual properties: a positive temperature coefficient of resistivity (PTCR) and negative differential resistivity. These phenomena are often considered to be unrelated and PTCR usually results from grain boundary effects, but can be bulk [D. C. Sinclair and A. R. West, J. Appl. Phys. 66, 3850 (1989)]. Within the diffusion theory of Dawber and Scott [J. Phys. Condens. Mater. 16, L515 (2004)] they are necessarily related and we fitted the present data to their diffusion-limited model.

KW - diffusion

KW - electrical resistivity

KW - ferroelectric switching

KW - ferroelectric thin films

KW - grain boundaries

KW - lead compounds

KW - THIN-FILMS

KW - LIMITED CURRENT

KW - ELECTRODES

KW - CAPACITORS

KW - EMISSION

KW - PZT

U2 - 10.1063/1.3138781

DO - 10.1063/1.3138781

M3 - Article

SN - 0003-6951

VL - 94

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

M1 - 212903

ER -

Positive temperature coefficient of resistivity and negative differential resistivity in lead iron tunstate-lead zirconate titate

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Keywords

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