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

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 $\mathring{A}$.

4 pages, 6 figures

References in corpus (2)

• On the importance of the electron-phonon coupling function on the superconducting transition temperature in dodecaboride superconductors: A comparison of LuB12 with ZrB12
• Charge transport in Ho${}_x$Lu${}_{1-x}$B${}_{12}$: Separating Positive and Negative Magnetoresistance in Metals with Magnetic Ions

Cited by in corpus (5)

• Rattling mode and symmetry lowering resulting from instability of B${}_{12}$-molecule in LuB${}_{12}$
• Lattice instability and enhancement of superconductivity in YB${}_6$
• Inhomogeneous superconductivity in LuxZr1-xB12 dodecaborides with dynamic charge stripes
• Observation of a crossover from nodal to gapped superconductivity in Lu${}_x$Zr${}_{1-x}$B${}_{12}$
• Superconducting phase diagrams of LuB${}_{12}$ and Lu${}_{1-x}$Zr${}_x$B${}_{12}$ ($x\le 0.45$) down to 50 mK