Fabrication and characterization of ferromagnetic-superconducting hybrid films grown by combined PVD techniques
Applied Surface Science, vol.350, pp.2-5, 2015 (SCI-Expanded, Scopus)
- Publication Type: Article / Abstract
- Volume: 350
- Publication Date: 2015
- Doi Number: 10.1016/j.apsusc.2015.02.080
- Journal Name: Applied Surface Science
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.2-5
- Keywords: Magnetic thin films, Permalloy, Superconductivity, Superconductor ferromagnet hybrids
- Ondokuz Mayıs University Affiliated: No
Abstract
This study reports micro-fabricated magnet and superconductor (permalloy/Pb 82 Bi 18 ) hybrid film structures sequentially grown by magnetron sputtering and thermal deposition techniques. 300 nm thick PbBi film was quench condensed on top of a patterned permalloy film. Permalloy film was sputtered and patterned to form few micrometer-wide stripes. Ferromagnetic and superconducting layers were separated by Al 2 O 3 insulation. Transport superconducting properties, i.e. transition temperature T C (H) and second critical field H C2 (T) were measured in a range of applied magnetic field between H = 0 and H = 7 kOe for the hybrid system and a control sample with only a layer of superconducting film deposited. The H C2 (T) data showed that due to the interplay between the superconducting film and the ferromagnet, superconducting (SC) and normal current paths formed on the SC film.