Advertisement
Published in:
13-05-2020
Reentrant superconductivity in \(\hbox {YBa}_{2}\hbox {Cu}_{3}\hbox {O}_{7-\delta }\) microstructured particles
Published in: Journal of Materials Science: Materials in Electronics | Issue 12/2020
Log inActivate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
Abstract
A reentrant superconducting effect was observed in YBCO particles as a consequence of their size and microstructure. It rises from the coexistence between bulk superconductivity and surface ferromagnetism, where the enhanced magneto-electric coupling induced by broken spatial-inversion symmetry in layers near structural defects plays a very important role on surface ferromagnetism. The study assumes grain boundaries inside the particles act as additional surface regions that enhance the ferromagnetic properties. Magnetic and superconducting properties as a function of particle size were studied. Particularly, the 385 nm particles which were the ones that exhibited the reentrant superconducting effect. The Ginzburg–Landau parameter and the critical temperatures are \(\textit{k}\sim 1.29 \pm .03, T _{c1}= 92 \pm 0.5\hbox { K}\), and \(T_{{c2}} \approx 10 \pm 3{\text{ K}}\).