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Application of MMMA method: Dispersed superconductors and magnetic nanolayers

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Abstract

Microwave nonresonant dissipation observed around zero field makes a powerful method in characterizing superconducting state (to determineT C,H C1,H CJ parameters). This review shows several successful applications of magnetically modulated microwave absorption (MMMA). MMMA enables to study MgB2 superconducting nanoregions embedded in the Mg host structure. Application of MMMA to study intercalation of fullerence enabled the observation of a new superconducting phase. The pressure effect dT C/dp has been studied below the percolation threshold in YBaCuO/PST composites. The local temperature of the Josephson junction measured by the MMMA technique showed that a granular superconductor consists of two phases: host phase and Josephson junction system. MMMA has been applied lately to separate the giant magnetoresistance from the magnetization effect in differential hysteresis loops.

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  1. Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60179, Poznan, Poland

    J. Stankowski

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  1. J. Stankowski
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Stankowski, J. Application of MMMA method: Dispersed superconductors and magnetic nanolayers. Appl. Magn. Reson. 27, 251–258 (2004). https://doi.org/10.1007/BF03166318

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  • DOI: https://doi.org/10.1007/BF03166318

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