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  μSR and magnetometry study of the type-I superconductor BeAu

Beare, J., Nugent, M., Wilson, M. N., Cai, Y., Munsie, T. J. S., Amon, A., et al. (2019). μSR and magnetometry study of the type-I superconductor BeAu. Physical Review B, 99(13): 134510, pp. 1-9. doi:10.1103/PhysRevB.99.134510.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-8AD3-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-8AD6-0
Genre: Journal Article

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 Creators:
Beare, J.1, Author
Nugent, M.1, Author
Wilson, M. N.1, Author
Cai, Y.1, Author
Munsie, T. J. S.1, Author
Amon, A.2, Author              
Leithe-Jasper, A.3, Author              
Gong, Z.1, Author
Guo, S. L.1, Author
Guguchia, Z.1, Author
Grin, Y.4, Author              
Uemura, Y. J.1, Author
Svanidze, E.2, Author              
Luke, G. M.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              
3Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              
4Juri Grin, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863413              

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 Abstract: We present muon spin rotation and relaxation (mu SR) measurements as well as demagnetizing-field-corrected magnetization measurements on polycrystalline samples of the noncentrosymmetric superconductor BeAu. From mu SR measurements in a transverse field, we determine that BeAu is a type-I superconductor with H-c = 258 Oe, amending the previous understanding of the compound as a type-II superconductor. To account for demagnetizing effects in magnetization measurements, we produce an ellipsoidal sample, for which a demagnetization factor can be calculated. After correcting for demagnetizing effects, our magnetization results are in agreement with our mu SR measurements. Using both types of measurements, we construct a phase diagram from T = 30 mK to T-c approximate to 3.25 K. We then study the effect of hydrostatic pressure and find that 450 MPa decreases T-c by 35 mK, comparable to the change seen in the type-I elemental superconductors Sn, In, and Ta. This suggests BeAu is far from a quantum critical point accessible by the application of pressure.

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Language(s): eng - English
 Dates: 2019-04-112019-04-11
 Publication Status: Published in print
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 99 (13) Sequence Number: 134510 Start / End Page: 1 - 9 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008