Micron size superconducting quantum interference devices of lead (Pb)

Autor:	Paul, Sagar, Biswas, Sourav, Gupta, Anjan K.
Rok vydání:	2016
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Supercond. Sci. Technol. 30 (2017) 025017
Druh dokumentu:	Working Paper
DOI:	10.1088/1361-6668/aa51e3
Popis:	Micron size superconducting quantum interference devices ($\mu$-SQUID) of lead (Pb), for probing nano-magnetism, were fabricated and characterized. In order to get continuous Pb films with small grain size, Pb was thermally evaporated on a liquid nitrogen cooled Si substrate. Pb was sandwiched between two thin Cr layers for improved adhesion and protection. The SQUID pattern was made by e-beam lithography with Pb lift-off after deposition. The current-voltage characteristics of these devices show a critical current, which exhibits the expected SQUID oscillations with magnetic field, and two re-trapping currents. As a result these devices have hysteresis at low temperatures, which disappears just below the critical temperature. Comment: 4 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1612.09200 Zobrazit plný text záznamu View this record from Arxiv