Magnetic flux rotation and two types of additional maxima in magnetization curves of LaSrCuO single crystals in tilted magnetic field

Magnetic hysteresis loops of LaSrCuO superconducting single crystals were studied by means of a vibrating sample magnetometer at T = 4.2 K. It was directly confirmed that two types of secondary maxima are present in the magnetization curves. By means of vector magnetization measurements we proved th...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 1996-02, Vol.257 (3), p.284-290
Main Authors: Bugoslavsky, Yu.V., Ivanov, A.L., Kovalsky, V.A., Minakov, A.A.
Format: Article
Language:English
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Summary:Magnetic hysteresis loops of LaSrCuO superconducting single crystals were studied by means of a vibrating sample magnetometer at T = 4.2 K. It was directly confirmed that two types of secondary maxima are present in the magnetization curves. By means of vector magnetization measurements we proved that low-field secondary maxima in tilted magnetic field are caused by the flux line lattice rotation in the process of the sample magnetization. The high-field magnetization maximum in tilted field, corresponding to an anomalous increase of the critical current (‘fishtail’) is strongly correlated with the alignment of the magnetization vector parallel to the c axis. It is discussed that fishtails originate due to stretched pinning sites in an anisotropic superconductor.
ISSN:0921-4534
1873-2143
DOI:10.1016/0921-4534(95)00720-2