Thermoelectric power and transport properties ofMg1−xAlxB2

2001/04/02 by B. Lorenz, R. L. Meng, Y. Y. Xue +1 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Superconductivity in MgB2 and Alloys #Thermal Expansion and Ionic Conductivity #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.64.052513

published as Phys. Rev. B 64, 052513 (2001) · 10 pages, 2 figures; submitted to Physical Review B (April 2, 2001)

arxiv created 2001/04/02 · openalex publication_date 2001/07/17 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We have measured the thermoelectric power S and resistivity \ensuremathρ of Mg_1\ensuremath-xAl_xB₂. S is positive and increases linearly with temperature above the superconducting transition temperature T_c. Deviations from the linear dependence appear at higher temperature, T>T₀\ensuremath≈160 K. T_c and T₀ both decrease with Al doping whereas the slope of S(T) in the linear range increases with the Al content. The data are discussed in terms of doping-induced changes of the Fermi surface and the density of states at the Fermi level.

Citations

• Transition Temperature of Strong-Coupled Superconductors

Cited by

• Thermoelectric power ofMgB2−xBex