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

• Authors: N. Sluchanko , A. Azarevich , A. Bogach , S. Gavrilkin , V. Glushkov , S. Demishev , K. Mitsen , N. Shitsevalova , V. Filippov , S. Gabani , K. Flachbart
• Languages of publication: 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

EN

74.25.-q; 74.62.Bf; 74.70.Ad

Discipline

• 74.62.Bf: Effects of material synthesis, crystal structure, and chemical composition(for methods of materials synthesis, see 81.20.-n)
• 74.25.-q: Properties of superconductors
• 74.70.Ad: Metals; alloys and binary compounds (including A15, MgB2, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 131
• Issue: 4
• Pages: 1036-1038

Dates

published

2017-04

Contributors

author

N. Sluchanko

• Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
• Moscow Institute of Physics and Technology, Institutskii per. 9, 141700, Dolgoprudnyi, Russia

author

A. Azarevich

• Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia

author

A. Bogach

• Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia

author

S. Gavrilkin

• Lebedev Physical Institute RAS, Leninskii av. 53, 119991 Moscow, Russia

author

V. Glushkov

• Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
• Moscow Institute of Physics and Technology, Institutskii per. 9, 141700, Dolgoprudnyi, Russia

author

S. Demishev

• Prokhorov General Physics Institute, RAS, Vavilov Str. 38, 119991 Moscow, Russia
• Moscow Institute of Physics and Technology, Institutskii per. 9, 141700, Dolgoprudnyi, Russia

author

K. Mitsen

• Lebedev Physical Institute RAS, Leninskii av. 53, 119991 Moscow, Russia

author

N. Shitsevalova

• Frantsevich Institute for Problems of Materials Science, NASU, Krzhizhanovskii Str. 3, 03680 Kiev, Ukraine

author

V. Filippov

• Frantsevich Institute for Problems of Materials Science, NASU, Krzhizhanovskii Str. 3, 03680 Kiev, Ukraine

author

S. Gabani

• Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia

author

K. Flachbart

• Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia

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Identifiers

DOI

10.12693/APhysPolA.131.1036