Magnetic field penetration in MgB2 single crystals: pinning and Meissner holes

Автор(и)

  • V. Chabanenko A. Galkin Dоnetsk Institute for Physics and Engineering, NASU, Donetsk 83114, Ukraine
  • S. Katrych Institute of Condensed Matter Physics, EPFL, Lausanne 1015, Switzerland
  • N.D. Zhigadlo Laboratory for Solid State Physics, ETH Zurich, Zurich 8093, Switzerland
  • J. Karpinski Laboratory for Solid State Physics, ETH Zurich, Zurich 8093, Switzerland
  • F. Pérez-Rodríguez Instituto de Física, Benemérita Universidad Autónoma de Puebla, Puebla, México
  • R. Cortés-Maldonado Instituto de Física, Benemérita Universidad Autónoma de Puebla, Puebla, México
  • I. Abal’osheva Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, Warsaw 02-668, Poland
  • P. Mikheenko Department of Physics, University of Oslo, P.O. Box 1048, Blindern 0316, Oslo, Norway
  • V.V. Yurchenko Department of Physics, University of Oslo, P.O. Box 1048, Blindern 0316, Oslo, Norway
  • E. Kuchuk A. Galkin Dоnetsk Institute for Physics and Engineering, NASU, Donetsk 83114, Ukraine
  • R. Puźniak Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, Warsaw 02-668, Poland

DOI:

https://doi.org/10.1063/1.4887061%20

Ключові слова:

magnetooptic of flux penetration, vortices, antivortices, Meissner holes, inhomogeneous pinning, single crystal MgB2.

Анотація

The evolution of flux distribution in MgB2 single crystals during their remagnetization was imaged with magneto-optical technique. Meissner holes, formed as the areas where the annihilation of vortices and antivortices takes place, were found at the boundary between oppositely magnetized parts of the crystal. Gradient of magnetic induction in the vicinity of Meissner holes was found to be enhanced. Finger-like structures of convex shape, formed during the penetration of magnetic flux inside the crystal, were observed and explained as an effect of inhomogeneous pinning and demagnetizing field redistribution in the sample.

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Опубліковано

2014-05-13

Як цитувати

(1)
Chabanenko, V.; Katrych, S.; Zhigadlo, N.; Karpinski, J.; Pérez-Rodríguez, F.; Cortés-Maldonado, R.; Abal’osheva, I.; Mikheenko, P.; Yurchenko, V.; Kuchuk, E.; Puźniak, R. Magnetic Field Penetration in MgB2 Single Crystals: Pinning and Meissner Holes. Fiz. Nizk. Temp. 2014, 40, 801-806.

Номер

Том 40 № 7 (2014)

Розділ

Надпровідність, зокрема високотемпературна