Crystal structure of the Mg$_{1-x}$Al$_x$B$_2$ superconductors near x=0.5

Details Crystal structure of the Mg$_{1-x}$Al$_x$B$_2$ superconductors near x=0.5 Crystal structure of the Mg$_{1-x}$Al$_x$B$_2$ superconductors near x=0.5

2002-03-31

arxiv.org/abs/cond-mat/0204015v1

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.66.014518

Precise structural information on the Mg1-xAlxB2 superconductors in the vicinity of x 0.5 is derived from high-resolution synchrotron X-ray powder diffraction measurements. We find that a hexagonal superstructure, accompanied by doubling of the c-axis, ordering of Mg and Al in alternating layers, and a shift of the B layers towards Al by ~0.1 A, is formed. The unusually large width of the (001/2) superlattice peak implies the presence of microstrain broadening, arising from anisotropic stacking of Al and Mg layers and/or structural modulations within the ab plane. The ordered phase survives only over a limited range of compositions away from the optimum x= 0.5 doping level.

Affiliated with

Also associated with

No associations

Rating

Crystal structure of the Mg$_{1-x}$Al$_x$B$_2$ superconductors near x=0.5 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 Crystal structure of the Mg$_{1-x}$Al$_x$B$_2$ superconductors near x=0.5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Crystal structure of the Mg$_{1-x}$Al$_x$B$_2$ superconductors near x=0.5 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-412909