Oxygen-dependent transport properties in La0.7Ba0.3MnO3-δ thin films for uncooled infrared bolometric materials

Ken Ichi Hayashi; Eiji Ohta; Hideo Wada

doi:10.1117/12.448171

Oxygen-dependent transport properties in La_0.7Ba_0.3MnO_3-δ thin films for uncooled infrared bolometric materials

Ken Ichi Hayashi, Eiji Ohta, Hideo Wada

Department of Applied Physics and Physico-Informatics

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

Abstract

La_0.7Ba_0.3MnO_3-δ (LBMO) has been noticed as a potential candidate for an uncooled infrared bolometer material, which has a large temperature dependent electrical resistance, as a potential candidate for an uncooled infrared bolometer material. The LBMO thin films were deposited on SrTiO₃ (100) substrates by a laser ablation method. The films were characterized by an x-ray diffractometer. In the observation by an atomic force microscope, the size of the crystal grains and the number of grain boundaries on the films were extremely sensitive on the ambient oxygen pressure during the deposition. The grain size found to have an effect on both the magnitude of the resistivity and the temperature dependence of resistivity. The films deposited under the oxygen pressures of 53.3∼80.0Pa, having the temperature dependence of resistivity like a bulk, and it showed a large temperature coefficient of resistance (TCR: defined as 1/R dR/dT) over 3%/K near room temperature.

Original language	English
Pages (from-to)	160-167
Number of pages	8
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4454
DOIs	https://doi.org/10.1117/12.448171
Publication status	Published - 2001 Dec 1
Event	Materials for Infrared Detectors - San Diego, CA, United States Duration: 2001 Jul 30 → 2001 Aug 1

Keywords

Atomic force microscope
Laser ablation
Temperature coefficient of resistance
Uncooled infrared bolometer
X-ray diffraction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.448171

Cite this

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title = "Oxygen-dependent transport properties in La0.7Ba0.3MnO3-δ thin films for uncooled infrared bolometric materials",

abstract = "La0.7Ba0.3MnO3-δ (LBMO) has been noticed as a potential candidate for an uncooled infrared bolometer material, which has a large temperature dependent electrical resistance, as a potential candidate for an uncooled infrared bolometer material. The LBMO thin films were deposited on SrTiO3 (100) substrates by a laser ablation method. The films were characterized by an x-ray diffractometer. In the observation by an atomic force microscope, the size of the crystal grains and the number of grain boundaries on the films were extremely sensitive on the ambient oxygen pressure during the deposition. The grain size found to have an effect on both the magnitude of the resistivity and the temperature dependence of resistivity. The films deposited under the oxygen pressures of 53.3∼80.0Pa, having the temperature dependence of resistivity like a bulk, and it showed a large temperature coefficient of resistance (TCR: defined as 1/R dR/dT) over 3%/K near room temperature.",

keywords = "Atomic force microscope, Laser ablation, Temperature coefficient of resistance, Uncooled infrared bolometer, X-ray diffraction",

author = "Hayashi, {Ken Ichi} and Eiji Ohta and Hideo Wada",

year = "2001",

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doi = "10.1117/12.448171",

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journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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T1 - Oxygen-dependent transport properties in La0.7Ba0.3MnO3-δ thin films for uncooled infrared bolometric materials

AU - Hayashi, Ken Ichi

AU - Ohta, Eiji

AU - Wada, Hideo

PY - 2001/12/1

Y1 - 2001/12/1

N2 - La0.7Ba0.3MnO3-δ (LBMO) has been noticed as a potential candidate for an uncooled infrared bolometer material, which has a large temperature dependent electrical resistance, as a potential candidate for an uncooled infrared bolometer material. The LBMO thin films were deposited on SrTiO3 (100) substrates by a laser ablation method. The films were characterized by an x-ray diffractometer. In the observation by an atomic force microscope, the size of the crystal grains and the number of grain boundaries on the films were extremely sensitive on the ambient oxygen pressure during the deposition. The grain size found to have an effect on both the magnitude of the resistivity and the temperature dependence of resistivity. The films deposited under the oxygen pressures of 53.3∼80.0Pa, having the temperature dependence of resistivity like a bulk, and it showed a large temperature coefficient of resistance (TCR: defined as 1/R dR/dT) over 3%/K near room temperature.

AB - La0.7Ba0.3MnO3-δ (LBMO) has been noticed as a potential candidate for an uncooled infrared bolometer material, which has a large temperature dependent electrical resistance, as a potential candidate for an uncooled infrared bolometer material. The LBMO thin films were deposited on SrTiO3 (100) substrates by a laser ablation method. The films were characterized by an x-ray diffractometer. In the observation by an atomic force microscope, the size of the crystal grains and the number of grain boundaries on the films were extremely sensitive on the ambient oxygen pressure during the deposition. The grain size found to have an effect on both the magnitude of the resistivity and the temperature dependence of resistivity. The films deposited under the oxygen pressures of 53.3∼80.0Pa, having the temperature dependence of resistivity like a bulk, and it showed a large temperature coefficient of resistance (TCR: defined as 1/R dR/dT) over 3%/K near room temperature.

KW - Atomic force microscope

KW - Laser ablation

KW - Temperature coefficient of resistance

KW - Uncooled infrared bolometer

KW - X-ray diffraction

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JF - Proceedings of SPIE - The International Society for Optical Engineering

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