TY - JOUR
T1 - High-pressure torsion for production of magnetoresistance in Cu-Co alloy
AU - Suehiro, Kenichiro
AU - Nishimura, Shunichi
AU - Horita, Zenji
AU - Mitani, Seiji
AU - Takanashi, Koki
AU - Fujimori, Hiroyasu
N1 - Funding Information:
Acknowledgements This work was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan, in Priority Areas ‘‘Giant Straining Process for Advanced Materials Containing Ultra-High Density Lattice Defects’’ and in part by Kyushu University Interdisciplinary Programs in Education and Projects in Research Development (P&P).
PY - 2008/12
Y1 - 2008/12
N2 - 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.
AB - 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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U2 - 10.1007/s10853-008-2813-9
DO - 10.1007/s10853-008-2813-9
M3 - Article
AN - SCOPUS:57849136006
SN - 0022-2461
VL - 43
SP - 7349
EP - 7353
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 23-24
ER -