Growth of whisker-like and bulk single crystals of PrFeAs(O,F) under high pressure

Abstract

Superconducting whisker like and bulk single crystals of PrFeAs(O,F) were grown at 3 GPa and 1500 C from NaAs flux using the cubic anvil high pressure and high temperature technique. The ribbon shaped whisker like crystals were 400-1300 micrometers in length, 40-70 micrometers in width, and 5-10 micrometers in thickness with the long sharp edge in the ab plane and the c axis perpendicular to the face. The grown bulk crystals were found to have irregular plate like shapes with linear sizes up to 1 mm and 120 micrometers in thickness. The both type of single crystalline objects are crystallized in the same tetragonal structure and showed a single phase behavior in the temperature dependence of magnetization with a superconducting transition temperature of about 31 K. The presence of temperature gradient and reactive flux seems to play an important role for the growth of single crystalline whiskers and bulk single crystals of PrFeAs(O,F). These observations demonstrate that the morphological properties of the crystals are depending not only on the symmetry of the crystal structure of the desired material, but also of the growth medium.

References in corpus (8)

• High magnetic field scales and critical currents in SmFeAs(O,F) crystals: promising for applications
• Single crystal of superconducting SmFeAsO1-xFy grown at high pressure
• Hall effect and magnetoresistance in single crystals of NdFeAsO${}_{1-x}$F${}_x$
• High-pressure flux growth, structural, and superconducting properties of LnFeAsO (Ln = Pr, Nd, Sm) single crystals
• Th substituted SmFeAsO: structural details and superconductivity with Tc above 50 K
• Interplay of composition, structure, magnetism, and superconductivity in SmFeAs1-xPxO1-y
• Conventional superconductivity and hysteretic Campbell penetration depth in single crystals MgCNi${}_3$
• High-pressure synthesis and superconductivity of Ca2-xNaxCuO2Cl2

Cited by in corpus (14)

• Crystal growth of hexagonal boron nitride (hBN) from Mg-B-N solvent system under high pressure
• Spontaneous growth of diamond from MnNi solvent-catalyst using opposed anvil-type high-pressure apparatus
• High pressure crystal growth of the antiperovskite centrosymmetric superconductor SrPt3P
• Growth of bulk single-crystal MnP helimagnet and its structural and NMR characterization
• Crystal growth, characterization and advanced study of the noncentrosymmetric superconductor Mo${}_3$Al${}_2$C
• High-pressure growth and characterization of bulk MnAs single crystals
• Superconductivity of underdoped PrFeAs(O,F) investigated via point-contact spectroscopy and nuclear magnetic resonance
• Fe-As bond fluctuations in a double-well potential in LaFeAsO
• Intrinsic charge dynamics in high-Tc AFeAs(O,F) superconductors
• Nodal-to-nodeless superconducting order parameter in LaFeAs${}_{1-x}$P${}_x$O synthesized under high pressure
• Crystal growth and characterization of the antiperovskite superconductor MgC1-xNi3-y
• High-pressure high-temperature solution growth, structural, and superconducting properties of Fe-substituted MgB2 single crystals
• High-pressure self-flux growth and characterization of Li-deficient Li0.95FeAs single crystals
• Vortex matter and strong pinning in underdoped PrFeAs(O,F) with atomic-sized defects