The Effect of the Pinning Center Size on the Vortex Pinning by Embedded ZrO2 Nano-particles

Autor:	Ali M’chirgui, Asma Ouerghi, Nahed Moutalbi
Rok vydání:	2010
Předmět:	Superconductivity Materials science Flux pinning Zener pinning Condensed matter physics Condensed Matter::Superconductivity Cuprate Particle size Condensed Matter Physics Pinning force Electronic Optical and Magnetic Materials Vortex Coherence length
Zdroj:	Journal of Superconductivity and Novel Magnetism. 24:165-168
ISSN:	1557-1947 1557-1939
DOI:	10.1007/s10948-010-0912-8
Popis:	The influence of pinning centers size on the superconducting properties was investigated. Through the addition of three batches of ZrO2 nano-particles with mean size of D1=13 nm, D2=21 nm, and D3=85 nm, we have succeeded in incorporating effective artificial pinning centers within the YBCO matrix of the bulk superconductor. An enhancement in the flux pinning and an improvement in the critical current densities (transport critical current density Jct and magnetic critical current density Jcm) were achieved. The results indicate that slight inclusions of ZrO2 can greatly enhance the flux pinning capability of samples. Comparative analyses of the critical current densities and the resulting pinning force Fp for the three diameters have shown that pinning centers with finer size are much more efficient than those with a size larger than the coherence length ξ.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28632e74aae3ac1e5558ca0f95b07db1 https://doi.org/10.1007/s10948-010-0912-8 Zobrazit plný text záznamu Full text from SpringerLink