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2017 | 131 | 4 | 1036-1038
Article title

Superconductivity in Lu_xZr_{1-x}B_{12} Dodecaborides with Cage-Glass Crystal Structure

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EN
Abstracts
EN
We probed the evolution of the superconducting transition temperature T_c and the normal state parameters of Lu_xZr_{1-x}B_{12} solid solutions employing resistivity, heat capacity and magnetization measurements. In these studies of high-quality single crystals it was found that there are two types of samples with different magnetic characteristics. An unusually strong suppression of superconductivity in Lu_xZr_{1-x}B_{12} with a rate dT_c/dx=0.21 K/at.% of Lu was observed previously on the first "magnetic" set of crystals, and it was argued to be caused by the emergence of static spin polarization in the vicinity of non-magnetic lutetium ions. On the contrary, the second (current) set of "nonmagnetic" crystals demonstrates a conventional T_c(x) dependence with a rate dT_c/dx=0.12 K/at.% of Lu which is typical for BCS-type superconductors doped by nonmagnetic impurities. The reason for this difference is yet unclear. Moreover, the H-T phase diagram of the superconducting state of Lu_xZr_{1-x}B_{12} (0 ≤ x ≤ 1) solid solutions has been deduced from magnetization measurements.
Keywords
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Contributors
author
  • Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
  • Moscow Institute of Physics and Technology, Institutskii per. 9, 141700, Dolgoprudnyi, Russia
author
  • Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
author
  • Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
author
  • Lebedev Physical Institute RAS, Leninskii av. 53, 119991 Moscow, Russia
author
  • Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
  • Moscow Institute of Physics and Technology, Institutskii per. 9, 141700, Dolgoprudnyi, Russia
author
  • Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
  • Moscow Institute of Physics and Technology, Institutskii per. 9, 141700, Dolgoprudnyi, Russia
author
  • Lebedev Physical Institute RAS, Leninskii av. 53, 119991 Moscow, Russia
  • Frantsevich Institute for Problems of Materials Science, NASU, Krzhizhanovskii Str. 3, 03680 Kiev, Ukraine
author
  • Frantsevich Institute for Problems of Materials Science, NASU, Krzhizhanovskii Str. 3, 03680 Kiev, Ukraine
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
  • Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv131n4139kz
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