Abstract
Polycrystalline Ba4NbIr3O12 has recently been shown to be a promising spin liquid candidate. We report an easy and reliable method to grow millimeter-sized single crystals of this trimer based spin liquid candidate material with the actual stoichiometry of Ba4Nb0.8Ir3.2O12. The growth of large crystals is achieved using BaCl2 as flux. The crystals show hexagonal plate-like habit with edges up to 3 mm in length. The structure is confirmed by single crystal X-ray diffraction and is found to be the same as of previously reported phase Ba12Nb2.4Ir9.6O36 [Ba4Nb0.8Ir3.2O12], indeed with a mixed occupancy of Nb/Ir at 3a site. The magnetic and calorimetric study on the individual single crystals confirms the possibility of a spin liquid state consistent with a recent report on a polycrystalline sample
Highlights
Polycrystalline Ba4NbIr3O12 has recently been shown to be a promising spin liquid candidate
Quantum spin liquid (QSL) materials have been a topic of intense research very recently owing to their very rich and interesting magnetic properties like long-range entanglement and fractional quantum excitations without any spontaneous symmetry breaking of the crystal lattice or spins
Very recently an Ir-based oxide containing Ir3O12 trimers has been proposed as a candidate material based on the magnetic and calorimetric studies of a polycrystalline sample.[8]
Summary
Polycrystalline Ba4NbIr3O12 has recently been shown to be a promising spin liquid candidate. This compound had been first reported as microcrystalline material with crystals only suitable for diffraction studies, no other properties were reported.[9] High-quality single crystals are essential to confirm the spin liquid state by various thermodynamic and microscopic measurement techniques such as specific heat, dynamic susceptibility, neutron scattering, etc.
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