Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3268435
Keywords
cobalt compounds; crystal growth from solution; electrical resistivity; high-temperature superconductors; iron compounds; lanthanum compounds; lattice constants; magnetic susceptibility; magnetisation
Categories
Funding
- U. S. DOE [DE-AC02-06CH11357]
- United States Department of Energy, Office of Basic Energy Sciences, Materials Science [DE-AC05-00OR22725]
- [DE-AC02-07CH11358]
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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.
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