Superconducting transition and phase diagram of single-crystal MgB2
| Autor: | Ulrich Welp, K. H. Kim, Byeongwon Kang, Thierry Klein, Goran Karapetrov, Jacques Marcus, Andreas Rydh, W. K. Kwok, C. Marcenat, G. W. Crabtree, S.-I. Lee, Chang Uk Jung, Hangil Lee, L. M. Paulius |
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| Přispěvatelé: | Material Science Division [ANL] (MSD), Argonne National Laboratory [Lemont] (ANL), Service de Physique Statistique, Magnétisme et Supraconductivité (SPSMS - UMR 9001), Institut Nanosciences et Cryogénie (INAC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire d'Etudes des Propriétés Electroniques des Solides (LEPES), Université Joseph Fourier - Grenoble 1 (UJF)-Institut National Polytechnique de Grenoble (INPG)-Centre National de la Recherche Scientifique (CNRS), NVCRICS, Pohang University of Science and Technology (POSTECH) |
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Physics
Superconductivity Condensed matter physics Condensed Matter - Superconductivity Transition temperature 74.25.Dw 74.25.Ha 74.25.Op 74.25.Qt FOS: Physical sciences 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Coherence length Superconductivity (cond-mat.supr-con) [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] Magnetization Condensed Matter::Superconductivity 0103 physical sciences 010306 general physics 0210 nano-technology Anisotropy Critical field Single crystal Phase diagram |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2003, 67, pp.012505. ⟨10.1103/PhysRevB.67.012505⟩ Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2003, 67, pp.012505. ⟨10.1103/PhysRevB.67.012505⟩ |
| ISSN: | 1098-0121 1550-235X |
| DOI: | 10.1103/PhysRevB.67.012505⟩ |
| Popis: | The superconducting phase diagram of ${\mathrm{MgB}}_{2}$ was determined from magnetization, magnetotransport, and single-crystal specific-heat measurements. A zero-temperature in-plane coherence length of 9.4 nm is determined. The superconducting anisotropy \ensuremath{\gamma} increases from a value around 2 near ${T}_{c}$ to above 4.5 at 22 K. For $H\ensuremath{\parallel}c$ a pronounced peak effect in the critical current occurs at the upper critical field. Evidence for a surface superconducting state is presented for $H\ensuremath{\parallel}c$ that might account for the widespread in reported values of \ensuremath{\gamma}. |
| Databáze: | OpenAIRE |
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