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2004
Superconductors
D 8000
Discriminating Lattice Structural Effects from Electronic Contributions to the
Superconductivity of Doped MgB2 with Nanotechnology. — The dominant factors
52- 012 influencing
the superconducting transition behavior of the title compound are characterized by discriminating lattice structural effects from electronic contributions to
superconductivity utilizing the intrinsic structural behavior of nanocrystalline materials. In general, lattice constants of bulk materials are modified as crystal sizes approach
nanoscales. The superconductivity of MgB2 is extremely sensitive to lattice parameter
variation, such that contraction of the Mg—Mg bond dramatically depresses Tc and
eventually results in the loss of superconductivity as the average coordination of Mg to
B falls from 12 to 8 due to the introduction of B vacancies for nanocrystalline MgB2 of
2.5 nm diameter. — (LI*, S.; WHITE, T.; SUN, C. Q.; FU, Y. Q.; PLEVERT, J.;
LAUREN, K.; J. Phys. Chem. B 108 (2004) 42, 16415-16419; Sch. Mater. Sci. Eng.,
Univ. N. S. W., Sydney, N. S. W. 2052, Australia; Eng.) — W. Pewestorf
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