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Magnetic-field tuned anisotropy in superconducting RbxFe2−ySe2


Bosma, S; Puzniak, R; Krzton-Maziopa, A; Bendele, M; Pomjakushina, E; Conder, K; Keller, H; Weyeneth, S (2012). Magnetic-field tuned anisotropy in superconducting RbxFe2−ySe2. Physical Review B, 85(6):064509.

Abstract

The anisotropic superconducting properties of a RbxFe2−ySe2 single crystal with Tc≃32 K were investigated by means of superconducting quantum interference device (SQUID) and torque magnetometry, probing the effective magnetic penetration depth λeff and the magnetic penetration depth anisotropy γλ. Interestingly, γλ is found to be temperature independent in the superconducting state but strongly field dependent: γλ(0.2 T)<4 and γλ(1.4 T)>8. This unusual anisotropic behavior, together with a large zero-temperature λeff(0)≃1.8 μm, is possibly related to a superconducting state heavily biased by the coexisting antiferromagnetic phase.

Abstract

The anisotropic superconducting properties of a RbxFe2−ySe2 single crystal with Tc≃32 K were investigated by means of superconducting quantum interference device (SQUID) and torque magnetometry, probing the effective magnetic penetration depth λeff and the magnetic penetration depth anisotropy γλ. Interestingly, γλ is found to be temperature independent in the superconducting state but strongly field dependent: γλ(0.2 T)<4 and γλ(1.4 T)>8. This unusual anisotropic behavior, together with a large zero-temperature λeff(0)≃1.8 μm, is possibly related to a superconducting state heavily biased by the coexisting antiferromagnetic phase.

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Additional indexing

Other titles:Magnetic-field tuned anisotropy in superconducting Rb_{x}Fe_{2−y}Se_{2}
Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2012
Deposited On:07 Dec 2012 14:07
Last Modified:05 Apr 2016 16:07
Publisher:American Physical Society
Series Name:Physical Review B (Condensed Matter and Materials Physics)
ISSN:1098-0121
Publisher DOI:https://doi.org/10.1103/PhysRevB.85.064509

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