Advances in high-pressure laser floating zone growth: the Laser Optical Kristallmacher II

Abstract

The optical floating zone crystal growth technique is a well-established method for obtaining large, high-purity single crystals. While the floating zone method has been constantly evolving for over six decades, the development of high-pressure (up to 1000 bar) growth systems has only recently been realized via the combination of laser-based heating sources with an all-metal chamber. While our inaugural high-pressure laser floating zone furnace design demonstrated the successful growth of new volatile and metastable phases, the furnace design faces several limitations with imaging quality, heating profile control, and chamber cooling power. Here, we present a second-generation design of the high-pressure laser floating zone furnace, "Laser Optical Kristallmacher II" (LOKII), and demonstrate that this redesign facilitates new advances in crystal growth by highlighting several exemplar materials: $\alpha$-Fe${}_2$O${}_3$, $\beta$-Ga${}_2$O${}_3$, and La${}_2$CuO${}_{4+\delta }$. Notably, for La${}_2$CuO${}_{4+\delta }$, we demonstrate the feasibility and long-term stability of traveling solvent floating zone growth under a record pressure of 700 bar.

9 pages, 6 figures

References in corpus (8)

• Antiferromagnetic spintronics
• Scale-free structural organization of oxygen interstitials in La2CuO4+y
• Efficient Spin-Orbit Torques in an Antiferromagnetic Insulator with Tilted Easy Plane
• Neutron scattering study of the effects of dopant disorder on the superconductivity and magnetic order in stage-4 La_2CuO_{4+y}
• An Intrinsic Tendency of Electronic Phase Separation into Two Superconducting States in La(2-x)Sr(x)CuO(4+delta)
• High-Pressure Laser Floating Zone Furnace
• Evaluating the Effects of Structural Disorder on the Magnetic Properties of Nd${}_2$Zr${}_2$O${}_7$
• Refined Spin Wave Model and Multi-magnon Bound States in $L{i}_{2}Cu{O}_2$

Cited by in corpus (3)

• Characterization of Chromium Impurities in $\beta$-Ga${}_2$O${}_3$
• High-pressure floating zone crystal growth of Sr${}_2$IrO${}_4$
• Growth of hexagonal BN crystals by traveling-solvent floating zone