Mn-substitution effects on MgB2 superconductor

Details Mn-substitution effects on MgB2 superconductor Mn-substitution effects on MgB2 superconductor

2001-04-27

arxiv.org/abs/cond-mat/0104534v1

Physics

Condensed Matter

Superconductivity

2 pages, 5 figure

Scientific paper

10.1143/JPSJ.70.1889

Effects of magnetic impurity on the superconductivity has been investigated in Mg1-xMnB2. With increase of Mn concentration x, the lattice constant c (perpendicular to the boron sheet) decreases at a rate of -1.4 % (= dlnc/dx), while a remains nearly unchanged. The transition temperature Tc steeply decreases with $x$ at a rate of dTc/dx = - 159 K. These results suggest that superconducting state of the parent MgB2 is amenable to the magnetic impurities, i.e., Mn2+.

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