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Phase segregation and giant magnetoresistance behavior in as-deposited Co-Ag film grown by pulsed laser deposition

Zhang, W; Boyd, IW; Cohen, NS; Bui, QT; Pankhurst, QA; Elliott, M; HerrendenHarkerand, W; (1997) Phase segregation and giant magnetoresistance behavior in as-deposited Co-Ag film grown by pulsed laser deposition. JOURNAL OF APPLIED PHYSICS , 81 (8) 5211 - 5213.

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Abstract

The growth of Co-Ag granular films on Si (100) substrates by pulsed laser deposition (PLD) is reported. It is found that phase segregation can be directly produced in as-deposited Co-Ag granular films. This is attributed to the high quench rates induced by PLD, unlike the film deposited by sputtering, where post-annealing is required to achieve the required phase segregation. A large magnetoresistance (MR) value of around 27% was obtained at 4.2 K under a magnetic field of 4.7 T in as-deposited Ag0.70Co0.30 films. Our results suggest that the large magnetoresistance values obtained are strongly determined by phase segregation and particle size in association with the laser fluences used. (C) 1997 American Institute of Physics.

Type: Article
Title: Phase segregation and giant magnetoresistance behavior in as-deposited Co-Ag film grown by pulsed laser deposition
Location: ATLANTA, GA
Keywords: MAGNETIC-PROPERTIES, THIN-FILMS, ALLOYS, SYSTEM
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Pop Health Sciences > UCL GOS Institute of Child Health
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/59479
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