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arXiv · 1507.08513

Suppression of Superconductivity in Lu$_x$Zr$_{1-x}$B$_{12}$ : Evidence of Static Magnetic Moments Induced by Non-Magnetic Impurities

N. E. Sluchanko·A. N. Azarevich·M. A. Anisimov·A. V. Bogach·S. Yu. Gavrilkin·V. V. Glushkov·S. V. Demishev·A. L. Khoroshilov·A. V. Dukhnenko·K. V. Mitsen·N. Yu. Shitsevalova·V. B. Filippov·V. V. Voronov·K. Flachbart
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Abstract

Based on low temperature resistivity, heat capacity and magnetization investigations we show that the unusually strong suppression of superconductivity in Lu$_x$Zr$_{1-x}$B$_{12}$ BSC-type superconductors in the range $x$$<$0.08 is caused by the emergence of static spin polarization in the vicinity of non-magnetic lutetium impurities. The analysis of received results points to a formation of static magnetic moments with $\mu_{eff}$$\approx$$3\mu_B$ per Lu-ion. The size of these spin polarized nanodomains was estimated to be about 5 ${\AA}$.

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N. E. Sluchanko, A. N. Azarevich, M. A. Anisimov, A. V. Bogach, S. Yu. Gavrilkin, V. V. Glushkov, S. V. Demishev, A. L. Khoroshilov, A. V. Dukhnenko, K. V. Mitsen, N. Yu. Shitsevalova, V. B. Filippov, V. V. Voronov, K. Flachbart. 2015-07-30. Suppression of Superconductivity in Lu$_x$Zr$_{1-x}$B$_{12}$ : Evidence of Static Magnetic Moments Induced by Non-Magnetic Impurities. https://doi.org/10.1103/physrevb.93.085130

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