[1] Natl Inst Mat Sci, Superconducting Mat Ctr, Tsukuba, Ibaraki 3050044, Japan
[2] Natl Inst Mat Sci, Computat Mat Sci Ctr, Tsukuba, Ibaraki 3050044, Japan
[3] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
[4] Univ Maryland, Dept Mat & Nucl Engn, College Pk, MD 20742 USA
[5] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA