1. Single-Crystal Growth of a Perovskite Ruthenate SrRuO3by the Floating-Zone Method.
- Author
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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
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