AlPd15B7: a new superconducting cage-compound with an anti-Yb3Rh4Sn13-type of structure

Qiang Zheng; Walter Schnelle; Yurii Prots; Matej Bobnar; Ulrich Burkhardt; Andreas Leithe-Jasper; Roman Gumeniuk

doi:10.1039/C5DT04751J

AlPd₁₅B₇: a new superconducting cage-compound with an anti-Yb₃Rh₄Sn₁₃-type of structure†

Qiang Zheng,^a Walter Schnelle,^a Yurii Prots,^a Matej Bobnar,^a Ulrich Burkhardt,^a Andreas Leithe-Jasper^a and Roman Gumeniuk*^ab

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* Corresponding authors

^a Max-Planck-Institut für Chemische Physik fester Stoffe, Nöthnitzer Str. 40, 01187 Dresden, Germany
E-mail: roman.gumeniuk@physik.tu-freiberg.de

^b Institut für Experimentelle Physik, TU Bergakademie Freiberg, Leipziger Str. 23, 09596 Freiberg, Germany

Abstract

A new intermetallic compound AlPd₁₅B₇ was synthesized by arc-melting the stoichiometric mixture of the elements. Single crystal X-ray diffraction data of ternary metal-rich boride reveal a new type of structure with the space group Ia [3 with combining macron] d and the lattice parameter a = 16.4466(3) Å. It adopts a filled anti-Yb₃Rh₄Sn₁₃-type structure, where the positions corresponding to 3Yb, 4Rh and 13Sn atoms are occupied by 3Pd, 4B, and 1Al + 12 Pd, respectively and 3B additionally at interstitial sites. Magnetic susceptibility, electrical resistivity, and specific heat measurements reveal bulk superconductivity with a critical temperature T_c ≈ 2.9 K. Electronic structure calculations show that Pd 4d and B 2p states dominate the density of states (DOS) at the Fermi level E_F.

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Article information

DOI: https://doi.org/10.1039/C5DT04751J
Article type: Paper
Submitted: 04 Dec 2015
Accepted: 18 Jan 2016
First published: 02 Feb 2016
This article is Open Access

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Dalton Trans., 2016,45, 3943-3948

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AlPd₁₅B₇: a new superconducting cage-compound with an anti-Yb₃Rh₄Sn₁₃-type of structure

Q. Zheng, W. Schnelle, Y. Prots, M. Bobnar, U. Burkhardt, A. Leithe-Jasper and R. Gumeniuk, Dalton Trans., 2016, 45, 3943 DOI: 10.1039/C5DT04751J

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