Flux growth at ambient pressure of millimeter-sized single crystals of LaFeAsO, LaFeAsO1-xFx, and LaFe1-xCoxAsO

TitleFlux growth at ambient pressure of millimeter-sized single crystals of LaFeAsO, LaFeAsO1-xFx, and LaFe1-xCoxAsO
Publication TypeJournal Article
Year of Publication2009
AuthorsYan JQ, Nandi S, Zarestky JL, Tian W, Kreyssig A, Jensen B, Kracher A, Dennis KW, McQueeney RJ, Goldman AI, McCallum RW, Lograsso TA
Journal TitleApplied Physics Letters
Volume95
Pages222504
Date Published11/30
ISBN Number0003-6951
Accession NumberISI:000272627600042
Keywordscobalt compounds, compound, crystal growth from solution, electrical resistivity, high-temperature superconductors, iron compounds, lanthanum compounds, lao1-xfxfeas, lattice constants, magnetic susceptibility, magnetisation, superconductivity
Abstract

Millimeter-sized single crystals of LaFeAsO, LaFeAsO1-xFx, and LaFe1-xCoxAsO were grown in NaAs flux at ambient pressure. The detailed growth procedure and crystal characterizations are reported. The as-grown crystals have typical dimensions of 3x4x0.05-0.3 mm(3) with the crystallographic c-axis perpendicular to the plane of the platelike single crystals. Various characterizations confirmed the high quality of our LaFeAsO crystals. Co and F were introduced into the lattice leading to superconducting LaFe1-xCoxAsO and LaFeAsO1-xFx single crystals, respectively. This growth protocol is expected to be broadly applicable to grow other RMAsO (R=rare earth, M=transition metal) compounds.

URL<Go to ISI>://000272627600042
DOI10.1063/1.3268435