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Flux growth at ambient pressure of millimeter-sized single crystals of LaFeAsO, , and
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Rocking curve through the (1 1 7) reflection of the LaFeAsO single crystal used for the x-ray diffraction study. Inset: picture of a LaFeAsO single crystal on millimeter grid paper. (b) Powder x-ray diffraction pattern of pulverized LaFeAsO single crystals. The weak extra diffraction peak (▼) at is from sodium arsenate hydrate.

Image of FIG. 2.
FIG. 2.

(a) The temperature dependence of magnetization of a LaFeAsO crystal measured under a magnetic field of 30 kOe. (b) The temperature dependence of orthorhombic distortion (x ray) and intensity of the magnetic reflection (1/2 1/2 3/2) (Neutron) of a LaFeAsO crystal.

Image of FIG. 3.
FIG. 3.

Electron microprobe spectrum of x-ray intensity vs wavelength for (a) the F-doped sample (●) compared to a F-free sample (○) and (b) Co-doped LaFeAsO. Insets show pictures of crystals on millimeter grid paper. Low-field data measured under a field of 35 Oe perpendicular to -axis and in-plane electrical resistivity for (c) a F-doped crystal and (d) .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Flux growth at ambient pressure of millimeter-sized single crystals of LaFeAsO, LaFeAsO1−xFx, and LaFe1−xCoxAsO