Single-crystal growth of Sr2RuO4 by the floating-zone method using an infrared image furnace with improved halogen lamps

Naoki Kikugawa; Dmitry A. Sokolov; Tohru Nagasawa; Andrew P. Mackenzie

doi:10.3390/cryst11040392

Single-crystal growth of Sr₂RuO₄ by the floating-zone method using an infrared image furnace with improved halogen lamps

Naoki Kikugawa^*, Dmitry A. Sokolov, Tohru Nagasawa, Andrew P. Mackenzie

^*Corresponding author for this work

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

Abstract

We report the single-crystal growth of the unconventional superconductor Sr₂RuO₄, on which research has reached a turning point recently. In order to optimize the quality of crystals grown by the floating-zone method using an infrared image furnace, we focus on an improvement of the structure of the filament in the halogen lamps. By reducing the thickness of the total filament, the form of the molten zone was narrowed. More importantly, the molten zone was observed to be more stable during the growth process. Finally, we obtained the crystals with a length of 12 cm. Additionally, the grown crystal has high quality, displaying the 1.5 K transition temperature expected only for the purest crystals. We also discuss the availability of the newly developed halogen lamps.

Original language	English
Article number	e392
Number of pages	10
Journal	Crystals
Volume	11
Issue number	4
DOIs	https://doi.org/10.3390/cryst11040392
Publication status	Published - 8 Apr 2021

Keywords

Floating-zone technique
Single crystal
Sr2RuO4
Molten-zone controlling

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10.3390/cryst11040392Licence: CC BY

Naoki_2021_crystals_Single-crystal-growth_CC
Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/4.0/).
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Cite this

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title = "Single-crystal growth of Sr2RuO4 by the floating-zone method using an infrared image furnace with improved halogen lamps",

abstract = "We report the single-crystal growth of the unconventional superconductor Sr2RuO4, on which research has reached a turning point recently. In order to optimize the quality of crystals grown by the floating-zone method using an infrared image furnace, we focus on an improvement of the structure of the filament in the halogen lamps. By reducing the thickness of the total filament, the form of the molten zone was narrowed. More importantly, the molten zone was observed to be more stable during the growth process. Finally, we obtained the crystals with a length of 12 cm. Additionally, the grown crystal has high quality, displaying the 1.5 K transition temperature expected only for the purest crystals. We also discuss the availability of the newly developed halogen lamps.",

keywords = "Floating-zone technique, Single crystal, Sr2RuO4, Molten-zone controlling",

author = "Naoki Kikugawa and Sokolov, {Dmitry A.} and Tohru Nagasawa and Mackenzie, {Andrew P.}",

note = "Funding: This work is supported by a KAKENHI Grants-in-Aids for Scientific Research (Grant Nos.17H06136, 18K04715, and 21H01033) from the Japan Society for the Promotion of Science (JSPS) and by a JST-Mirai Program (Grant No. JPMJMI18A3). ",

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T1 - Single-crystal growth of Sr2RuO4 by the floating-zone method using an infrared image furnace with improved halogen lamps

AU - Kikugawa, Naoki

AU - Sokolov, Dmitry A.

AU - Nagasawa, Tohru

AU - Mackenzie, Andrew P.

N1 - Funding: This work is supported by a KAKENHI Grants-in-Aids for Scientific Research (Grant Nos.17H06136, 18K04715, and 21H01033) from the Japan Society for the Promotion of Science (JSPS) and by a JST-Mirai Program (Grant No. JPMJMI18A3).

PY - 2021/4/8

Y1 - 2021/4/8

N2 - We report the single-crystal growth of the unconventional superconductor Sr2RuO4, on which research has reached a turning point recently. In order to optimize the quality of crystals grown by the floating-zone method using an infrared image furnace, we focus on an improvement of the structure of the filament in the halogen lamps. By reducing the thickness of the total filament, the form of the molten zone was narrowed. More importantly, the molten zone was observed to be more stable during the growth process. Finally, we obtained the crystals with a length of 12 cm. Additionally, the grown crystal has high quality, displaying the 1.5 K transition temperature expected only for the purest crystals. We also discuss the availability of the newly developed halogen lamps.

AB - We report the single-crystal growth of the unconventional superconductor Sr2RuO4, on which research has reached a turning point recently. In order to optimize the quality of crystals grown by the floating-zone method using an infrared image furnace, we focus on an improvement of the structure of the filament in the halogen lamps. By reducing the thickness of the total filament, the form of the molten zone was narrowed. More importantly, the molten zone was observed to be more stable during the growth process. Finally, we obtained the crystals with a length of 12 cm. Additionally, the grown crystal has high quality, displaying the 1.5 K transition temperature expected only for the purest crystals. We also discuss the availability of the newly developed halogen lamps.

KW - Floating-zone technique

KW - Single crystal

KW - Sr2RuO4

KW - Molten-zone controlling

U2 - 10.3390/cryst11040392

DO - 10.3390/cryst11040392

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SN - 2073-4352

VL - 11

JO - Crystals

JF - Crystals

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ER -