Crystal growth of La2Hf2O7 by micro-pulling-down method using W crucible

Takahiro Suda; Yuui Yokota; Takahiko Horiai; Akihiro Yamaji; Masao Yoshino; Takashi Hanada; Hiroki Sato; Satoshi Toyoda; Yuji Ohashi; Shunsuke Kurosawa; Kei Kamada; Akira Yoshikawa

doi:10.1016/j.jcrysgro.2022.126547

Crystal growth of La₂Hf₂O₇ by micro-pulling-down method using W crucible

Takahiro Suda, Yuui Yokota, Takahiko Horiai, Akihiro Yamaji, Masao Yoshino, Takashi Hanada, Hiroki Sato, Satoshi Toyoda, Yuji Ohashi, Shunsuke Kurosawa, Kei Kamada, Akira Yoshikawa

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

Abstract

La₂Hf₂O₇ crystals with a melting point of ∼2418 °C were grown by the micro-pulling-down method using a W crucible and deoxygenated ZrO₂ insulators. A La₂Hf₂O₇ crystal grown at a rate of 0.07 mm/min (LHO[0.07 mm/min]) showed a high transparency without any visible cracks and inclusions, while a La₂Hf₂O₇ crystal grown at a rate of 2.00 mm/min had some cracks. The LHO[0.07 mm/min] crystal had a transmittance of over 70% in the wavelength range of 450–800 nm. The X-ray rocking curve of the LHO[0.07 mm/min] crystal showed a symmetric sharp peak with a full width at half maximum of 138 arcsec. The Laue image revealed that the grown crystals were single crystals.

Original language	English
Article number	126547
Journal	Journal of Crystal Growth
Volume	583
DOIs	https://doi.org/10.1016/j.jcrysgro.2022.126547
Publication status	Published - 2022 Apr 1

Keywords

A2. Growth from melt
A2. Single crystal growth
B1. Oxides
B2. Phosphors

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jcrysgro.2022.126547

Cite this

@article{13eb8fd3a5b847cbb9d61562da0b62a0,

title = "Crystal growth of La2Hf2O7 by micro-pulling-down method using W crucible",

abstract = "La2Hf2O7 crystals with a melting point of ∼2418 °C were grown by the micro-pulling-down method using a W crucible and deoxygenated ZrO2 insulators. A La2Hf2O7 crystal grown at a rate of 0.07 mm/min (LHO[0.07 mm/min]) showed a high transparency without any visible cracks and inclusions, while a La2Hf2O7 crystal grown at a rate of 2.00 mm/min had some cracks. The LHO[0.07 mm/min] crystal had a transmittance of over 70% in the wavelength range of 450–800 nm. The X-ray rocking curve of the LHO[0.07 mm/min] crystal showed a symmetric sharp peak with a full width at half maximum of 138 arcsec. The Laue image revealed that the grown crystals were single crystals.",

keywords = "A2. Growth from melt, A2. Single crystal growth, B1. Oxides, B2. Phosphors",

author = "Takahiro Suda and Yuui Yokota and Takahiko Horiai and Akihiro Yamaji and Masao Yoshino and Takashi Hanada and Hiroki Sato and Satoshi Toyoda and Yuji Ohashi and Shunsuke Kurosawa and Kei Kamada and Akira Yoshikawa",

note = "Funding Information: This study was partially supported by Japan Society for the Promotion of Science (JSPS) KAKENHI, the Grant-in-Aid for Scientific Research [19H02795, JP16H06439], Development of Systems and Technology for Advanced Measurement and Analysis, Japan Science and Technology Agency (JST), and Adaptable & Seamless Technology Transfer Program through Target-driven R&D A-STEP (JST) [AS272S003a]. Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = apr,

day = "1",

doi = "10.1016/j.jcrysgro.2022.126547",

language = "English",

volume = "583",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier",

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T1 - Crystal growth of La2Hf2O7 by micro-pulling-down method using W crucible

AU - Suda, Takahiro

AU - Yokota, Yuui

AU - Horiai, Takahiko

AU - Yamaji, Akihiro

AU - Yoshino, Masao

AU - Hanada, Takashi

AU - Sato, Hiroki

AU - Toyoda, Satoshi

AU - Ohashi, Yuji

AU - Kurosawa, Shunsuke

AU - Kamada, Kei

AU - Yoshikawa, Akira

N1 - Funding Information: This study was partially supported by Japan Society for the Promotion of Science (JSPS) KAKENHI, the Grant-in-Aid for Scientific Research [19H02795, JP16H06439], Development of Systems and Technology for Advanced Measurement and Analysis, Japan Science and Technology Agency (JST), and Adaptable & Seamless Technology Transfer Program through Target-driven R&D A-STEP (JST) [AS272S003a]. Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/4/1

Y1 - 2022/4/1

N2 - La2Hf2O7 crystals with a melting point of ∼2418 °C were grown by the micro-pulling-down method using a W crucible and deoxygenated ZrO2 insulators. A La2Hf2O7 crystal grown at a rate of 0.07 mm/min (LHO[0.07 mm/min]) showed a high transparency without any visible cracks and inclusions, while a La2Hf2O7 crystal grown at a rate of 2.00 mm/min had some cracks. The LHO[0.07 mm/min] crystal had a transmittance of over 70% in the wavelength range of 450–800 nm. The X-ray rocking curve of the LHO[0.07 mm/min] crystal showed a symmetric sharp peak with a full width at half maximum of 138 arcsec. The Laue image revealed that the grown crystals were single crystals.

AB - La2Hf2O7 crystals with a melting point of ∼2418 °C were grown by the micro-pulling-down method using a W crucible and deoxygenated ZrO2 insulators. A La2Hf2O7 crystal grown at a rate of 0.07 mm/min (LHO[0.07 mm/min]) showed a high transparency without any visible cracks and inclusions, while a La2Hf2O7 crystal grown at a rate of 2.00 mm/min had some cracks. The LHO[0.07 mm/min] crystal had a transmittance of over 70% in the wavelength range of 450–800 nm. The X-ray rocking curve of the LHO[0.07 mm/min] crystal showed a symmetric sharp peak with a full width at half maximum of 138 arcsec. The Laue image revealed that the grown crystals were single crystals.

KW - A2. Growth from melt

KW - A2. Single crystal growth

KW - B1. Oxides

KW - B2. Phosphors

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