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  High-pressure flux growth, structural, and superconducting properties of LnFeAsO (Ln = Pr, Nd, Sm) single crystals

Zhigadlo, N. D., Weyeneth, S., Katrych, S., Moll, P. J. W., Rogacki, K., Bosma, S., et al. (2012). High-pressure flux growth, structural, and superconducting properties of LnFeAsO (Ln = Pr, Nd, Sm) single crystals. Physical Review B, 86(21): 214509. doi:10.1103/PhysRevB.86.214509.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-000B-79CE-6 Versions-Permalink: https://hdl.handle.net/21.11116/0000-000B-79CF-5
Genre: Zeitschriftenartikel

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externe Referenz:
https://doi.org/10.1103/PhysRevB.86.214509 (Verlagsversion)
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Urheber

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 Urheber:
Zhigadlo, N. D.1, Autor
Weyeneth, S.1, Autor
Katrych, S.1, Autor
Moll, P. J. W.1, Autor
Rogacki, K.1, Autor
Bosma, S.1, Autor
Puzniak, R.1, Autor
Karpinski, J.1, Autor
Batlogg, B.1, Autor
Affiliations:
1external, ou_persistent22              

Inhalt

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Schlagwörter: -
 Zusammenfassung: Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high pressure. The crystals are of good structural quality and become superconducting when O is partially substituted by F (PrFeAsO1−xFx and NdFeAsO1−xFx) or when Fe is substituted by Co (SmFe1−xCoxAsO). From magnetization measurements, we estimate the temperature dependence and anisotropy of the upper critical field and the critical current density of underdoped PrFeAsO0.7F0.3 crystal with Tc ≈ 25 K. Single crystals of SmFe1−xCoxAsO with maximal Tc up to 16.3 K for x ≈ 0.08 were grown. From transport and magnetic measurements, we estimate the critical fields and their anisotropy and find these superconducting properties to be quite comparable to the ones in SmFeAsO1−xFx with a much higher Tc ≈ 50 K. The magnetically measured critical current densities are as high as 109 A/m2 at 2 K up to 7 T, with indication of the usual fishtail effect. The upper critical field estimated from resistivity measurements is anisotropic with slopes of ∼−8.7 T/K (H||ab plane) and ∼−1.7 T/K (H||c axis). This anisotropy (∼5) is similar to that in other Ln1111 crystals with various higher Tc's.

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Sprache(n): eng - English
 Datum: 2012
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1103/PhysRevB.86.214509
 Art des Abschluß: -

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Quelle 1

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Titel: Physical Review B
  Kurztitel : Phys. Rev. B
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 86 (21) Artikelnummer: 214509 Start- / Endseite: - Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008