Studies on Giant and Colossal Magnetoresistance of Alloy and Ceramic Prepared by RF Magnetron Sputtering and Pulsed Laser Ablation Techniques
Magnetic thin films based on the giant magnetoresistance (GMR) and colossal magnetoresistance (CMR) effects are currently being used as head sensor in the magnetic data storage technology. With the technological revolution in the magnetic recording world of last decades, a need of better and more...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2002
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/9526/1/FSAS_2002_56_A.pdf |
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| Summary: | Magnetic thin films based on the giant magnetoresistance (GMR) and colossal
magnetoresistance (CMR) effects are currently being used as head sensor in the
magnetic data storage technology. With the technological revolution in the magnetic
recording world of last decades, a need of better and more sensitive
magnetoresistance material arises for head sensing. In the first part of this work, a
series of Ag-Fe-Co granular films with different composition and thickness had been
fabricated onto microscope glass slides using RF magnetron sputtering system. The
crystalline analysis show that the as-deposited films consist of <111> and <200>
silver texture. Negative GMR values have been obtained and no tendency to saturate
at any temperature has been observed. The experimental results show that the GMR
value is governed by the composition, microstructure, thickness and temperature.
Under an optimum condition, formation of the right shape and size of magnetic
cluster in the matrix will cause rapid increase of the GMR value. |
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