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Article

Single-Crystal Growth of Sr2RuO4 by the Floating-Zone Method Using an Infrared Image Furnace with Improved Halogen Lamps

1
National Institute for Materials Science, Ibaraki 305-0003, Japan
2
Max Plank Institute for Chemical Physics of Solids, D-01187 Dresden, Germany
3
Canon Machinery Inc., Shiga 524-0044, Japan
4
School of Physics and Astronomy, University of St. Andrews, St. Andrews KY16 9SS, UK
*
Author to whom correspondence should be addressed.
Academic Editors: Mihai-Ionut Sturza and Shiv J. Singh
Crystals 2021, 11(4), 392; https://doi.org/10.3390/cryst11040392
Received: 18 March 2021 / Revised: 2 April 2021 / Accepted: 6 April 2021 / Published: 8 April 2021
(This article belongs to the Special Issue Synthesis and Crystal Growth of Superconductors Materials)
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. View Full-Text
Keywords: floating-zone technique; single crystal; Sr2RuO4; molten-zone controlling floating-zone technique; single crystal; Sr2RuO4; molten-zone controlling
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MDPI and ACS Style

Kikugawa, N.; Sokolov, D.A.; Nagasawa, T.; Mackenzie, A.P. Single-Crystal Growth of Sr2RuO4 by the Floating-Zone Method Using an Infrared Image Furnace with Improved Halogen Lamps. Crystals 2021, 11, 392. https://doi.org/10.3390/cryst11040392

AMA Style

Kikugawa N, Sokolov DA, Nagasawa T, Mackenzie AP. Single-Crystal Growth of Sr2RuO4 by the Floating-Zone Method Using an Infrared Image Furnace with Improved Halogen Lamps. Crystals. 2021; 11(4):392. https://doi.org/10.3390/cryst11040392

Chicago/Turabian Style

Kikugawa, Naoki, Dmitry A. Sokolov, Tohru Nagasawa, and Andrew P. Mackenzie. 2021. "Single-Crystal Growth of Sr2RuO4 by the Floating-Zone Method Using an Infrared Image Furnace with Improved Halogen Lamps" Crystals 11, no. 4: 392. https://doi.org/10.3390/cryst11040392

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