David B. Zevallos G., A. Bustamante Dominguez, D. André Orna T., Luis De Los Santos Valladares, Mauro M. Dória, Isaías G. de Oliveira
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Abstract
In this paper we report our calculations regarding the heat absorbed by type-I superconducting needles with cross-sections of different geometric shapes, all having the same area. We used standard London theory to calculate the magnetic field inside these needles, allowing us to examine the magnetocaloric effect produced when the needles are subjected to a magnetic field difference. The cross-section geometries studied here include circular, square, triangular, heptagonal, hexagonal and ellipsoidal shapes. We also studied how small cylinders of different superconductors placed inside these needles influence the magnetocaloric effect of the overall system. Our main finding reveals a hierarchy in the ability to absorb heat based on the geometry of the straight cross-section. Notably, we discovered that there exists a temperature where above it, this hierarchy is inverted.
期刊介绍：
The Journal of Superconductivity and Novel Magnetism serves as the international forum for the most current research and ideas in these fields. This highly acclaimed journal publishes peer-reviewed original papers, conference proceedings and invited review articles that examine all aspects of the science and technology of superconductivity, including new materials, new mechanisms, basic and technological properties, new phenomena, and small- and large-scale applications. Novel magnetism, which is expanding rapidly, is also featured in the journal. The journal focuses on such areas as spintronics, magnetic semiconductors, properties of magnetic multilayers, magnetoresistive materials and structures, magnetic oxides, etc. Novel superconducting and magnetic materials are complex compounds, and the journal publishes articles related to all aspects their study, such as sample preparation, spectroscopy and transport properties as well as various applications.
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