Giant magnetoresistance in granular cobalt copper thin films prepared by pulsed laser ablation deposition
Giant magnetoresistance of up to 9.5% in 1.5 T at 14 K has been observed in Co19Cu81, thin films prepared by pulsed laser ablation deposition from rotated, split targets. The as-grown films show a small GMR effect but this may be enhanced by a factor of 4 by appropriate annealing. The volume ratio o...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Elsevier Science
1996
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| Online Access: | http://psasir.upm.edu.my/id/eprint/42496/ http://psasir.upm.edu.my/id/eprint/42496/1/Giant%20magnetoresistance%20in%20granular%20cobalt%20copper%20thin%20films%20prepared%20by%20pulsed%20laser%20ablation%20deposition.pdf http://psasir.upm.edu.my/id/eprint/42496/7/1-s2.0-0304885395006486-main.pdf http://psasir.upm.edu.my/id/eprint/42496/8/1-s2.0-0304885395006486-main.pdf |
| Summary: | Giant magnetoresistance of up to 9.5% in 1.5 T at 14 K has been observed in Co19Cu81, thin films prepared by pulsed laser ablation deposition from rotated, split targets. The as-grown films show a small GMR effect but this may be enhanced by a factor of 4 by appropriate annealing. The volume ratio of material in the target is found to be reproduced in the film. Measurements of the remanence and initial susceptibility of the films indicate a distribution of energy barriers to the rotation of the magnetic moments of the cobalt particles and also the presence of inter-particle interactions. The choice of operating parameters to control these effects and thus optimise the GMR is discussed. |
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