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Journal of Materials Science

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01-12-2008 | Ultrafine-Grained Materials

High-pressure torsion for production of magnetoresistance in Cu–Co alloy

Published in: Journal of Materials Science | Issue 23-24/2008

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Abstract

The process of high-pressure torsion (HPT) was applied to control the size and distribution of ferromagnetic Co particles in a Cu–Co alloy. Electron probe microanalysis, X-ray diffraction analysis, and transmission electron microscopy confirmed that the Co particles were significantly refined through fragmentation and dissolved with intense straining by HPT. Magnetoresistance appeared by ~2.5% at 77 K with an isotropic feature corresponding to giant magnetoresistance (GMR). It is demonstrated that HPT is a potential process for creating GMR in the Cu–Co alloy prepared by conventional ingot metallurgy.

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Title: High-pressure torsion for production of magnetoresistance in Cu–Co alloy
Publication date: 01-12-2008
Published in: Journal of Materials Science / Issue 23-24/2008
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-008-2813-9

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