Microwave Harmonic Emission in MgB2 Superconductor: Comparison with YBaCuO
A. Agliolo Gallitto, G. Bonsignore, E. Di Gennaro, G. Giunchi, M. Li, Vigni, P. Manfrinetti
TL;DR
This study investigates microwave second-harmonic generation in MgB2 superconductors, analyzing how it varies with temperature and magnetic field, and compares its behavior to that of YBaCuO superconductors.
Contribution
It provides the first detailed comparison of second-harmonic emission between MgB2 and YBaCuO superconductors, highlighting the influence of sample properties.
Findings
SH signal in MgB2 is weaker than in YBaCuO
SH signal varies with temperature and magnetic field
Sample properties significantly affect SH emission
Abstract
We report results of microwave second-harmonic generation in ceramic samples of MgB2, prepared by different methods. The SH signal has been investigated as a function of the temperature and the static magnetic field. The results are discussed in the framework of models reported in the literature. We show that the peculiarities of the SH signal are related to the specific properties of the sample. A comparison with the results obtained in ceramic and crystalline YBa(2)Cu(3)O(7) shows that the second-harmonic emission in MgB2 is weaker than that observed in ceramic YBa(2)Cu(3)O(7).
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