Novel Technique For Producing Highly Sensitive GMR Mechanical Alloys
ABSTRACT Novel technique for producing highly sensitive giant magnetoresistive (GMR) alloy is reported. Conventionally, mechanical alloy powers were pressed under high pressure to produce bulk samples and these samples exhibited 1-10% GMR at room temperature. In this work the samples were produced by filling mechanically alloyed Co30Cu70 powders in 500-mg drugs capsules. The Co30Cu70 capsule showed unto 70% GMR at room temperature in applied field of 1.1 Tesla. The structural, thermal and magnetic properties of the powders were characterised by x-ray diffraction (XRD), differential thermal analysis (DTA) and vibrating sample magnetometry (VSM) respectively. The proposed method is an interesting alternative to implement GMR materials since it involves low-cost techniques and can be synthesised in mass production.