publication . Article . Preprint . 2001

surface barrier and bulk pinning in mgb2 superconductor

Pissas, M.; Moraitakis, E.; Stamopoulos, D.; Papavassiliou, G.; Psycharis, V.; Koutandos, S.;
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  • Published: 09 Aug 2001 Journal: Journal of Superconductivity: Incorporating Novel Magnetism, volume 14, pages 615-621 (issn: 0896-1107, Copyright policy)
  • Publisher: Springer Nature
Abstract
We present a modified method of preparation of the new superconductor MgB$_2$. The polycrystalline samples were characterized using x-ray and magnetic measurements. The surface barriers control the isothermal magnetization loops in powder samples. In bulk as prepared samples we always observed symmetric magnetization loops indicative of the presence of a bulk pinning mechanism. Magnetic relaxation measurements in the bulk sample reveal a crossover of surface barrier to bulk pinning.
Subjects
arXiv: Condensed Matter::Superconductivity
Medical Subject Headings: human activitiesequipment and supplies
free text keywords: Condensed matter physics, Magnetic measurements, Flux pinning, Crystallite, Physics, Magnetic relaxation, Surface barrier, Pinning force, Magnetization, Superconductivity, Nuclear magnetic resonance, Condensed Matter - Superconductivity, Condensed Matter - Materials Science
Related Organizations
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publication . Article . Preprint . 2001

surface barrier and bulk pinning in mgb2 superconductor

Pissas, M.; Moraitakis, E.; Stamopoulos, D.; Papavassiliou, G.; Psycharis, V.; Koutandos, S.;