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Start Over Author "Naoki Kikugawa" Journal crystal growth & design
2 results on '"Naoki Kikugawa"'

1. Single-Crystal Growth of a Perovskite Ruthenate SrRuO3 by the Floating-Zone Method

Author

Ryan Baumbach, Naoki Kikugawa, James S. Brooks, Taichi Terashima, Shinya Uji, and Yoshiteru Maeno

Subjects
Materials science, Analytical chemistry, General Chemistry, Coercivity, Condensed Matter Physics, Crystal, Residual resistivity, Crystallography, Magnetization, Electrical resistivity and conductivity, Curie temperature, General Materials Science, Single crystal, Perovskite (structure)
Abstract

We report single-crystal growth of a perovskite ruthenate SrRuO3 by the floating-zone method using an infrared image furnace. By employing a cold trap for the growth, we prevented the evaporated RuO2 from coating the inner surface of a quartz tube and were thereby able to maintain a stable molten zone during the growth. Powder X-ray and Laue diffraction measurements confirmed the quality of the grown single crystal. The crystal was cut into a 1.4 mm × 1.4 mm × 3.0 mm rectangle that was characterized by magnetic susceptibility, magnetization, and specific heat measurements. The crystal showed a ferromagnetic transition with a Curie temperature of 163.5 K, and the coercive field was as low as 0.004 T. The residual resistivity was 1.05 μΩ cm, corresponding to a residual resistivity ratio of 192. These results indicate that the grown crystal is high-quality. Electrical resistivity measurements show temperature-squared behavior, revealing that a Fermi-liquid-like electron–electron scattering is dominant. Toget...

Published
2015
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2. Single-Crystal Growth of a Perovskite Ruthenate SrRuO3by the Floating-Zone Method.

Author

Naoki Kikugawa, Ryan Baumbach, JamesS. Brooks, Taichi Terashima, Shinya Uji, and Yoshiteru Maeno

Subjects
*CRYSTAL growth, *X-ray diffraction, *MAGNETIZATION, *CURIE temperature, *FERROMAGNETIC materials
Abstract

We report single-crystal growth ofa perovskite ruthenate SrRuO3by the floating-zone methodusing an infrared image furnace.By employing a cold trap for the growth, we prevented the evaporatedRuO2from coating the inner surface of a quartz tube andwere thereby able to maintain a stable molten zone during the growth.Powder X-ray and Laue diffraction measurements confirmed the qualityof the grown single crystal. The crystal was cut into a 1.4 mm ×1.4 mm × 3.0 mm rectangle that was characterized by magneticsusceptibility, magnetization, and specific heat measurements. Thecrystal showed a ferromagnetic transition with a Curie temperatureof 163.5 K, and the coercive field was as low as 0.004 T. The residualresistivity was 1.05 μΩ cm, corresponding to a residualresistivity ratio of 192. These results indicate that the grown crystalis high-quality. Electrical resistivity measurements show temperature-squaredbehavior, revealing that a Fermi-liquid-like electron–electronscattering is dominant. Together with a large electronic specificheat coefficient with 30 mJ K–2mol–1, we confirm that the ferromagnetic SrRuO3is a stronglycorrelated material. [ABSTRACT FROM AUTHOR]

Published
2015
Full Text
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