Infrared optical properties of Ba0.8Sr0.2TiO3 ferroelectric thin films

Zhiming Huang; Zhanhong Zhang; Chuping Jiang; Jian Yu; Jinlan Sun; Junhao Chu

doi:10.1063/1.1330224

Infrared optical properties of Ba_0.8Sr_0.2TiO₃ ferroelectric thin films

Zhiming Huang, Zhanhong Zhang, Chuping Jiang, Jian Yu, Jinlan Sun, Junhao Chu

CAS - Shanghai Institute of Technical Physics

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

33 Scopus citations

Abstract

Infrared optical properties of barium strontium titanate Ba_0.8Sr_0.2TiO₃ thin films grown on Pt/Ti/SiO₂/Si substrates are studied by infrared spectroscopic ellipsometry (IRSE) in the spectral range of 2.5-12.6 μm. The refractive index and extinction coefficient of Ba_0.8Sr_0.2TiO₃ are determined by fitting the IRSE data using a classical dielectric function formula. As the wavelength increases, the refractive index decreases, but on the contrary, the extinction coefficient increases. The absorption coefficient is greater than 1000 cm^-1 for the wavelength over 12.1 μm, but very small and less than 100 cm^-1 under 5.3 μm. The effective static ionic charge has also been derived, which is smaller than it would be in a purely ionic material for Ba_0.8Sr_0.2TiO₃ thin films.

Original language	English
Pages (from-to)	3651-3653
Number of pages	3
Journal	Applied Physics Letters
Volume	77
Issue number	22
DOIs	https://doi.org/10.1063/1.1330224
State	Published - 27 Nov 2000
Externally published	Yes

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title = "Infrared optical properties of Ba0.8Sr0.2TiO3 ferroelectric thin films",

abstract = "Infrared optical properties of barium strontium titanate Ba0.8Sr0.2TiO3 thin films grown on Pt/Ti/SiO2/Si substrates are studied by infrared spectroscopic ellipsometry (IRSE) in the spectral range of 2.5-12.6 μm. The refractive index and extinction coefficient of Ba0.8Sr0.2TiO3 are determined by fitting the IRSE data using a classical dielectric function formula. As the wavelength increases, the refractive index decreases, but on the contrary, the extinction coefficient increases. The absorption coefficient is greater than 1000 cm-1 for the wavelength over 12.1 μm, but very small and less than 100 cm-1 under 5.3 μm. The effective static ionic charge has also been derived, which is smaller than it would be in a purely ionic material for Ba0.8Sr0.2TiO3 thin films.",

author = "Zhiming Huang and Zhanhong Zhang and Chuping Jiang and Jian Yu and Jinlan Sun and Junhao Chu",

year = "2000",

month = nov,

day = "27",

doi = "10.1063/1.1330224",

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volume = "77",

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journal = "Applied Physics Letters",

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T1 - Infrared optical properties of Ba0.8Sr0.2TiO3 ferroelectric thin films

AU - Huang, Zhiming

AU - Zhang, Zhanhong

AU - Jiang, Chuping

AU - Yu, Jian

AU - Sun, Jinlan

AU - Chu, Junhao

PY - 2000/11/27

Y1 - 2000/11/27

N2 - Infrared optical properties of barium strontium titanate Ba0.8Sr0.2TiO3 thin films grown on Pt/Ti/SiO2/Si substrates are studied by infrared spectroscopic ellipsometry (IRSE) in the spectral range of 2.5-12.6 μm. The refractive index and extinction coefficient of Ba0.8Sr0.2TiO3 are determined by fitting the IRSE data using a classical dielectric function formula. As the wavelength increases, the refractive index decreases, but on the contrary, the extinction coefficient increases. The absorption coefficient is greater than 1000 cm-1 for the wavelength over 12.1 μm, but very small and less than 100 cm-1 under 5.3 μm. The effective static ionic charge has also been derived, which is smaller than it would be in a purely ionic material for Ba0.8Sr0.2TiO3 thin films.

AB - Infrared optical properties of barium strontium titanate Ba0.8Sr0.2TiO3 thin films grown on Pt/Ti/SiO2/Si substrates are studied by infrared spectroscopic ellipsometry (IRSE) in the spectral range of 2.5-12.6 μm. The refractive index and extinction coefficient of Ba0.8Sr0.2TiO3 are determined by fitting the IRSE data using a classical dielectric function formula. As the wavelength increases, the refractive index decreases, but on the contrary, the extinction coefficient increases. The absorption coefficient is greater than 1000 cm-1 for the wavelength over 12.1 μm, but very small and less than 100 cm-1 under 5.3 μm. The effective static ionic charge has also been derived, which is smaller than it would be in a purely ionic material for Ba0.8Sr0.2TiO3 thin films.

UR - https://www.scopus.com/pages/publications/0000186683

U2 - 10.1063/1.1330224

DO - 10.1063/1.1330224

M3 - 文章

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SN - 0003-6951

VL - 77

SP - 3651

EP - 3653

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 22

ER -

Infrared optical properties of Ba_0.8Sr_0.2TiO₃ ferroelectric thin films

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