Oxygen Inhomogeneity and Reversibility in Single Crystal LaNiO3−δ

While the mechanism of the insulator-metal transition in rare-earth perovskite nickelates is still under debate, LaNiO3 does not undergo this kind of transition und thus stands out as having particular importance in nickelate research. The floating zone crystal growth of LaNiO3−δ conducted by different research groups lead to very different conclusions from the observed features…

Magnetoelastic coupling of NiTiO3

In order to understand the origin and mechanism of the pronounced magnetodielectric coupling in NiTiO3, researchers from Heidelbergs Kirchoff Institute of Physics grew large, high-quality single crystals of this compound by means of the optical floating-zone technique (ScIDre HKZ two-mirror vertical configuration optical furnace and a four-mirror horizontal configuration) under various…

Synthesis of bulk Nd1-xSrxNiO2 and Nd1‑xSrxNiO3 improved with the A-HSO at Argonne National Lab

Resulting from the recent observation of superconductivity in Nd1-xSrxNiO2 the interest in the infinite-layer RNiO2 (R = La, Nd) compounds revived. Since experimental reports into RNiO2 compounds are quite limited,

Single-crystal growth of a new Ruthenate Ba26Ru12O57 at the Max-Planck-Institute in Dresden

Recently, Scientists of the Max-Planck-Institute for Chemical Physics of Solids (MPI CPfS) found a new compound in the scientificly interesting group of ruthenates. They report on the single crystal growth of Ba26Ru12O57 enabled with…

Intertwined density waves in a metallic nickelate

The sought-after mechanism of metal-to-metal transition in the Ruddlesden-Popper phase La4Ni3O10 could be revealed after 25 years of research in a recent publication. Combining single crystal synchrotron X-ray and neutron diffraction, coupled charge and spin order superlattices could be observed in high…

Comprehensive study of the metal-to-metal transition in Pr4Ni3O10

Motivated by structural similarities with the Cu-O layers in high-temperature superconductors, the compound Pr4Ni3O10, featuring quasi-2D Ni-O layers, was investigated as part of a cooperation between several swiss research facililties. The single-crystal growth was performed by means of the optical floating-zone method at an oxygen pressure of  about 140 bar using…

Luminescent properties of optical floating-zone grown YSH:Eu single crystal

A single crystal of europium doped YSH was grown by the optical floating zone method for the first time. The scientists of the Shanghai University grew the crystal with a nominal composition of Hf0.86Y0.13Eu0.01O1.93 under air atmosphere in a vertical double-ellipsoid mirror furnace (SciDre HKZ), equipped…

Joint publication with Augsburg University dealing with our Feedback Furnace

Our cooperation project with Augsburg University yielded beside the new instrument “Feedback Furnace” for flux crystal growth a first joint paper, published together with Andreas Schneider and Anton Jesche: In Situ Detection of Nucleation in High-Temperature Solutions

High pO2 Floating Zone Crystal Growth of the Perovskite Nickelate PrNiO3

Another member of the perovskite nickelates family PrNiO3 was succesfully grown as single crystal with a ScIDre HKZ furnace. Mainly executed by scientists from Argonne National Laboratory, the growth was performed in the PARADIM lab at Johns Hopkins University under oxygen pressures of 295 bar. Previous attemts to grow this crystals using our 150 bar floating zone furnace were unsuccessful,…

Magnetic properties of high-pressure optical floating-zone grown LaNiO3 single crystals

Sought-after single crystals of LaNiO3 were grown recently at the Kirchhoff Institute for Physics, Heidelberg University by means of the optical floating-zone method at oxygen pressures of 40 and 80 bar using a ScIDre HKZ furnace. The magnetic analysis of the samples indicates that long-range magnetic order is not intrinsic and most likely arising due to oxygen deficient phases.