Irradiation effect of synchrotron radiation on crystallization of thin amorphous WO3 film

Yuki Kimura; Katsumi Hanamoto; Yasuyuki Nakayama; Chihiro Kaito

doi:10.1016/S0168-583X(02)00685-7

Irradiation effect of synchrotron radiation on crystallization of thin amorphous WO₃ film

Yuki Kimura, Katsumi Hanamoto, Yasuyuki Nakayama, Chihiro Kaito

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

3 Citations (Scopus)

Abstract

In order to elucidate the effect of synchrotron radiation (SR) irradiation on crystal growth, crystallization of WO₃ films has been performed in vacuum under SR irradiation. The main results were compared with the results of heat treatment of the same film. Upon SR irradiation for 80 s using a toroidal mirror, a catastrophic change occurred, i.e. W₃O crystals (A-15 type) with a size of less than 30 nm appeared. Decomposition of the WO₃ film started at above 750 °C during vacuum heating. W, WO₂ and incommensurate WO₃ crystals appeared. W₃O crystal produced neither intense electron beam irradiation nor vacuum heating. These results will be discussed in terms of the differences caused by excitation with a SR beam, i.e. strong inner shell excitation and ionization of W and O may have taken place.

Original language	English
Pages (from-to)	187-192
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	194
Issue number	2
DOIs	https://doi.org/10.1016/S0168-583X(02)00685-7
Publication status	Published - Aug 2002

Keywords

Amorphous thin film
Crystallization
Electron microscopy
Irradiation
Tungsten oxide

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/S0168-583X(02)00685-7

Cite this

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title = "Irradiation effect of synchrotron radiation on crystallization of thin amorphous WO3 film",

abstract = "In order to elucidate the effect of synchrotron radiation (SR) irradiation on crystal growth, crystallization of WO3 films has been performed in vacuum under SR irradiation. The main results were compared with the results of heat treatment of the same film. Upon SR irradiation for 80 s using a toroidal mirror, a catastrophic change occurred, i.e. W3O crystals (A-15 type) with a size of less than 30 nm appeared. Decomposition of the WO3 film started at above 750 °C during vacuum heating. W, WO2 and incommensurate WO3 crystals appeared. W3O crystal produced neither intense electron beam irradiation nor vacuum heating. These results will be discussed in terms of the differences caused by excitation with a SR beam, i.e. strong inner shell excitation and ionization of W and O may have taken place.",

keywords = "Amorphous thin film, Crystallization, Electron microscopy, Irradiation, Tungsten oxide",

author = "Yuki Kimura and Katsumi Hanamoto and Yasuyuki Nakayama and Chihiro Kaito",

year = "2002",

month = aug,

doi = "10.1016/S0168-583X(02)00685-7",

language = "English",

volume = "194",

pages = "187--192",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

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publisher = "Elsevier",

number = "2",

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TY - JOUR

T1 - Irradiation effect of synchrotron radiation on crystallization of thin amorphous WO3 film

AU - Kimura, Yuki

AU - Hanamoto, Katsumi

AU - Nakayama, Yasuyuki

AU - Kaito, Chihiro

PY - 2002/8

Y1 - 2002/8

N2 - In order to elucidate the effect of synchrotron radiation (SR) irradiation on crystal growth, crystallization of WO3 films has been performed in vacuum under SR irradiation. The main results were compared with the results of heat treatment of the same film. Upon SR irradiation for 80 s using a toroidal mirror, a catastrophic change occurred, i.e. W3O crystals (A-15 type) with a size of less than 30 nm appeared. Decomposition of the WO3 film started at above 750 °C during vacuum heating. W, WO2 and incommensurate WO3 crystals appeared. W3O crystal produced neither intense electron beam irradiation nor vacuum heating. These results will be discussed in terms of the differences caused by excitation with a SR beam, i.e. strong inner shell excitation and ionization of W and O may have taken place.

AB - In order to elucidate the effect of synchrotron radiation (SR) irradiation on crystal growth, crystallization of WO3 films has been performed in vacuum under SR irradiation. The main results were compared with the results of heat treatment of the same film. Upon SR irradiation for 80 s using a toroidal mirror, a catastrophic change occurred, i.e. W3O crystals (A-15 type) with a size of less than 30 nm appeared. Decomposition of the WO3 film started at above 750 °C during vacuum heating. W, WO2 and incommensurate WO3 crystals appeared. W3O crystal produced neither intense electron beam irradiation nor vacuum heating. These results will be discussed in terms of the differences caused by excitation with a SR beam, i.e. strong inner shell excitation and ionization of W and O may have taken place.

KW - Amorphous thin film

KW - Crystallization

KW - Electron microscopy

KW - Irradiation

KW - Tungsten oxide

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