Growth, structure analysis and anisotropic superconducting properties of MgB2 single crystals

Details Growth, structure analysis and anisotropic superconducting properties of MgB2 single crystals Growth, structure analysis and anisotropic superconducting properties of MgB2 single crystals

2001-05-29

arxiv.org/abs/cond-mat/0105545v2

J. Phys. Soc. Jpn. vol70 (2001) pp.2255-2258

Physics

Condensed Matter

Superconductivity

9 pages, 5 figures and 1 table

Scientific paper

10.1143/JPSJ.70.2255

Here we report the growth of sub-millimeter MgB2 single crystals of various shapes under high pressure in Mg-B-N system. Structure refinement using a single-crystal X-ray diffraction analysis gives lattice parameters a=3.0851(5) A and c=3.5201(5) A with small reliability factors (Rw =0.025, R=0.018), which enables us to analyze the Fourier and Fourier difference maps. The maps clearly show the B sp2 orbitals and covalency of the B-B bonds. The sharp superconducting transitions at Tc =38.1-38.3K were obtained in both magnetization (DTc =0.6K) and resistivity (DTc <0.3K) measurements. Resistivity measurements with magnetic fields applied parallel and perpendicular to the Mg and B sheets reveal the anisotropic nature of this compound, with upper critical field anisotropy ratio of about 2.7.

Affiliated with

Also associated with

No associations

Rating

Growth, structure analysis and anisotropic superconducting properties of MgB2 single crystals does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Growth, structure analysis and anisotropic superconducting properties of MgB2 single crystals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Growth, structure analysis and anisotropic superconducting properties of MgB2 single crystals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-196932