Abstract
SmxPr1-xFeO3 (x = 0, 0.4, 0.7, 0.9, 1.0) all-in-one single crystal rod with quasi-continuous composition distribution was successfully grown by a hetero-seed and hetero-feed optical floating zone technique in flowing air. The lattice mismatch between each adjacent composition is very small, leading to the high-quality continuous growth of SmxPr1-xFeO3 single crystal rod. X-ray back-reflection Laue photographs indicate that all single crystals at different positions along the growth direction have good crystallization quality and the same crystallographic axis. The composition change of the quasi-continuous single crystals along growth direction was analyzed by energy-dispersive X-ray spectroscopy (EDS), which shows that the composition varies continuously and smoothly near the different composition boundaries. At a distance relatively far away from the boundary, the composition remains constant. Finally, we measured the anisotropic magnetic properties of these single crystals when x = 0.7. Our study shows that the hetero-seed and hetero-feed optical floating zone technique has a great potential for high-throughput growth of crystalline materials, and could serve as an effective method to collect single crystal material properties in materials database research.
Highlights
With the increasing demand of high-performance functional materials, RFeO3 rare-earth orthoferrites, where R is a rare-earth ion, have attracted much interest and became a key subject in many research areas, because of their novel magnetic,[1,2,3,4] magneto-optic,[5] multiferroic and magnetoelectric interaction[6,7] properties
When the PrFeO3 single crystal is used as seed rod, single crystals can be grown at the junction of the seed and feed rods
We find that the crystals with various components grow in the same direction as the seed rod
Summary
Previous magnetic studies showed that the spin reorientation transition temperature increases with increasing the Sm ion concentration in SmxDy1-xFeO3 system.[10,11]. To thoroughly study the doping effect on the magnetic properties of a material, one must grow many single crystal samples with different compositions, which is usually very time-consuming and costly. As an essential part of Materials Genome Initiative (MGI), high-throughput experiment is defined as an effective way to produce a large amount of material data in a short period of time. Little work has been done and reported for high-throughput preparation of bulk single crystals, mainly due to well control of the experimental conditions during the growth process is extremely difficult and needs sophisticated equipment and extensive experience.
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