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

Autor:	Seiji Mitani, Koki Takanashi, Hiroyasu Fujimori, Shunichi Nishimura, Kenichiro Suehiro, Zenji Horita
Rok vydání:	2008
Předmět:	Diffraction Materials science Magnetoresistance Mechanical Engineering Alloy Analytical chemistry Torsion (mechanics) Giant magnetoresistance engineering.material Crystallography Ferromagnetism Mechanics of Materials Transmission electron microscopy engineering General Materials Science Ingot
Zdroj:	Journal of Materials Science. 43:7349-7353
ISSN:	1573-4803 0022-2461
DOI:	10.1007/s10853-008-2813-9
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bc64b9d46d8829ba96830767845f5425 https://doi.org/10.1007/s10853-008-2813-9 Zobrazit plný text záznamu Plný text ve formátu PDF