Crystal Growth of a Lamellar Sr3Ru2O7–Sr4Ru3O10 Eutectic System

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• 作者：Rosalba Fittipaldi ; Daniela Sisti ; Antonio Vecchione ; Sandro Pace
• 刊名：Crystal Growth & Design
• 出版年：2007
• 出版时间：December 2007
• 年：2007
• 卷：7
• 期：12
• 页码：2495 - 2499
• 全文大小：1012K
• 年卷期：v.7,no.12(December 2007)
• ISSN：1528-7505

文摘

Lamellar eutectic crystals of Sr₃Ru₂O₇–Sr₄Ru₃O₁₀ have been successfully grown in a double-mirror optical floating zone furnace in the flux feeding floating zone configuration with Ru self-flux. The synthesis procedure of the polycrystalline rod is found to be a critical factor for the crystal growth. The eutectic dark-brown crystals grow in the [100] direction and cleave in the a–b plane as the single phase crystals. The morphology, structure, phase purity, and composition of the samples were analyzed by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results from backscattered electron (BSE) imaging as well as from energy dispersive spectrometry (EDS) were combined with the electron backscatter diffraction (EBSD) data to obtain complementary chemical and crystallographic information. Moreover, XRD analysis indicated that the Sr₃Ru₂O₇ and Sr₄Ru₃O₁₀ phases match the same crystal with parallel in-plane and out-of-plane lattice parameters. The resistance measurements showed a Fermi liquid behavior at low temperatures analogous to the one found in the single phases. We grew eutectic crystals representing natural junctions made of metamagnetic Sr₃Ru₂O₇ and ferromagnetic Sr₄Ru₃O₁₀ that may be useful in studies of possible novel quantum critical phenomena specific to itinerant magnetism systems.