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

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 o...

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Bibliographic Details
Main Authors: Chabanenko, V., Kuchuk, Е., Yurchenko, V.V., Mikheenko, P., Abal’osheva, I., Cortés-Maldonado, R., Pérez-Rodríguez, F., Karpinski, J., Zhigadlo, N.D., Katrych, S., Puźniak, R.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2014
Series:Физика низких температур
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Online Access:http://dspace.nbuv.gov.ua/handle/123456789/119540
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Summary: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.