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Tracking aluminium impurities in single crystals of the heavy-fermion superconductor UBe13
The influence of Al incorporation on the heavy fermion superconductor UBe 13 was investigated to explain the sample dependence of physical properties. Clear evidence for incorporated Al in flux-grown UBe 13 single crystals is presented by results from X-ray diffraction, nuclear magnetic resonance an...
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Published in: | Scientific reports 2018-07, Vol.8 (1), p.1-10, Article 10654 |
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creator | Amon, Alfred Zelenina, Iryna Simon, Paul Bobnar, Matej Naumann, Marcel Svanidze, Eteri Arnold, Frank Borrmann, Horst Burkhardt, Ulrich Schnelle, Walter Hassinger, Elena Leithe-Jasper, Andreas Grin, Yuri |
description | The influence of Al incorporation on the heavy fermion superconductor UBe
13
was investigated to explain the sample dependence of physical properties. Clear evidence for incorporated Al in flux-grown UBe
13
single crystals is presented by results from X-ray diffraction, nuclear magnetic resonance and X-ray spectroscopy. The increase of the lattice parameter and the concomitant change of the superconducting properties are caused by substitution of Be in the compound by 1–2 at.% Al. The minute amounts of Al in the structure were located by atomic resolution transmission electron microscopy. Specific heat measurements reveal the strong influence of incorporated Al on the physical properties of UBe
13
. Upon long-term annealing, Al incorporated in single crystals can leave the structure, restoring properties of Al-free polycrystalline UBe
13
. |
doi_str_mv | 10.1038/s41598-018-28991-w |
format | article |
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13
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13
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13
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13
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13
was investigated to explain the sample dependence of physical properties. Clear evidence for incorporated Al in flux-grown UBe
13
single crystals is presented by results from X-ray diffraction, nuclear magnetic resonance and X-ray spectroscopy. The increase of the lattice parameter and the concomitant change of the superconducting properties are caused by substitution of Be in the compound by 1–2 at.% Al. The minute amounts of Al in the structure were located by atomic resolution transmission electron microscopy. Specific heat measurements reveal the strong influence of incorporated Al on the physical properties of UBe
13
. Upon long-term annealing, Al incorporated in single crystals can leave the structure, restoring properties of Al-free polycrystalline UBe
13
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13
was investigated to explain the sample dependence of physical properties. Clear evidence for incorporated Al in flux-grown UBe
13
single crystals is presented by results from X-ray diffraction, nuclear magnetic resonance and X-ray spectroscopy. The increase of the lattice parameter and the concomitant change of the superconducting properties are caused by substitution of Be in the compound by 1–2 at.% Al. The minute amounts of Al in the structure were located by atomic resolution transmission electron microscopy. Specific heat measurements reveal the strong influence of incorporated Al on the physical properties of UBe
13
. Upon long-term annealing, Al incorporated in single crystals can leave the structure, restoring properties of Al-free polycrystalline UBe
13
.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>30006638</pmid><doi>10.1038/s41598-018-28991-w</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-5301-8867</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | 140/131 639/301/119/1003 639/638/298/924 639/766/119/1003 Aluminum Crystals Humanities and Social Sciences Impurities multidisciplinary NMR Nuclear magnetic resonance Physical properties Science Science (multidisciplinary) Single crystals Specific heat Transmission electron microscopy X-ray diffraction X-ray spectroscopy |
title | Tracking aluminium impurities in single crystals of the heavy-fermion superconductor UBe13 |
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