Temperature and field dependence of the anisotropy of MgB2

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dc.creatorAngst, M.
dc.creatorPuzniak, R.
dc.creatorWisniewski, A.
dc.creatorJun, J.
dc.creatorKazakov, S. M.
dc.creatorKarpinski, J.
dc.creatorRoos, J.
dc.creatorKeller, H.
dc.date2001-12-10
dc.date2002-03-16
dc.date.accessioned2026-07-07T12:05:02Z
dc.date.available2026-07-07T12:05:02Z
dc.descriptionThe anisotropy gamma of the superconducting state of high quality single-crystals of MgB2 was determined, using torque magnetometry with two different methods. The anisotropy of the upper critical field was found to be temperature dependent, decreasing from gamma = 6 at 15 K to 2.8 at 35 K. Reversible torque data near Tc reveal a field dependent anisotropy, increasing nearly linearly from gamma = 2 in zero field to 3.7 in 10 kOe. The unusual temperature dependence is a true bulk property and can be explained by non-local effects of anisotropic pairing and/or the wave vector dependence of the effective mass tensor.
dc.descriptionRevTex4, 5 pages, 5 figures, some revisions, changed Fig. 5; accepted for publication in PRL
dc.identifierhttps://arxiv.org/abs/cond-mat/0112166
dc.identifierhttp://arxiv.org/abs/cond-mat/0112166
dc.identifierPhys. Rev. Lett. 88, 167004 (2002)
dc.identifierdoi:10.1103/PhysRevLett.88.167004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/208276
dc.subjectSuperconductivity
dc.titleTemperature and field dependence of the anisotropy of MgB2
dc.typetext

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