Relationship between the microstructure and the magnetic properties of nano-scale magnetic particles formed in a Cu-10 at% Ni-5 at% Co alloy

Dong Hae Lee, Takahiro Moriki, Mahoto Takeda, Sung Kang, Dong Sik Bae, Masaki Mizuguchi, Koki Takanashi

Research output: Contribution to journalArticlepeer-review

Abstract

Cu-10 at% Ni-5 at% Co specimens containing nano-scale magnetic particles were investigated with respect to the relationship between the microstructure and the magnetic properties, by using a transmission electron microscope (TEM), a SQUID magnetometer and a magnetic thermobalance. The present TEM observations revealed that small magnetic precipitates were formed in a copper matrix in a specific manner that has never been reported in conventional precipitation alloys consisting of non-magnetic elements. The SQUID measurements indicated that a specimen annealed for a short period had a large coercive force, although the force decreased for longer annealing treatments. The magnetic thermogravity scan in the temperature range of 300-1223 K showed that the alloy specimen had a paramagnetic state between two ferromagnetic regions.

Original languageEnglish
Pages (from-to)555-558
Number of pages4
JournalJournal of the Korean Physical Society
Volume63
Issue number3
DOIs
Publication statusPublished - 2013 Aug 1

Keywords

  • Cu-Ni-Co
  • Magnetic properties
  • Magnetic thermobalance
  • Microstructure
  • SQUID magnetometer
  • TEM

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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