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

Kenichiro Suehiro, Shunichi Nishimura, Zenji Horita, Seiji Mitani, Koki Takanashi, Hiroyasu Fujimori

Research output: Contribution to journalArticle

14 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)7349-7353
Number of pages5
JournalJournal of Materials Science
Volume43
Issue number23-24
DOIs
Publication statusPublished - Dec 1 2008

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Magnetoresistance
Torsional stress
Giant magnetoresistance
Electron probe microanalysis
Metallurgy
Ingots
X ray diffraction analysis
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Suehiro, K., Nishimura, S., Horita, Z., Mitani, S., Takanashi, K., & Fujimori, H. (2008). High-pressure torsion for production of magnetoresistance in Cu-Co alloy. Journal of Materials Science, 43(23-24), 7349-7353. https://doi.org/10.1007/s10853-008-2813-9

High-pressure torsion for production of magnetoresistance in Cu-Co alloy. / Suehiro, Kenichiro; Nishimura, Shunichi; Horita, Zenji; Mitani, Seiji; Takanashi, Koki; Fujimori, Hiroyasu.

In: Journal of Materials Science, Vol. 43, No. 23-24, 01.12.2008, p. 7349-7353.

Research output: Contribution to journalArticle

Suehiro, K, Nishimura, S, Horita, Z, Mitani, S, Takanashi, K & Fujimori, H 2008, 'High-pressure torsion for production of magnetoresistance in Cu-Co alloy', Journal of Materials Science, vol. 43, no. 23-24, pp. 7349-7353. https://doi.org/10.1007/s10853-008-2813-9
Suehiro K, Nishimura S, Horita Z, Mitani S, Takanashi K, Fujimori H. High-pressure torsion for production of magnetoresistance in Cu-Co alloy. Journal of Materials Science. 2008 Dec 1;43(23-24):7349-7353. https://doi.org/10.1007/s10853-008-2813-9
Suehiro, Kenichiro ; Nishimura, Shunichi ; Horita, Zenji ; Mitani, Seiji ; Takanashi, Koki ; Fujimori, Hiroyasu. / High-pressure torsion for production of magnetoresistance in Cu-Co alloy. In: Journal of Materials Science. 2008 ; Vol. 43, No. 23-24. pp. 7349-7353.
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