Magnetoresistance in granular Co-Cu glass-coated microwires

Author

Zhukov, Arcady P. ; Martinez, Jose Luis ; Zhukova, Valentina A. ; Palomares, Javier ; Gonzalez, Julian ; Del Val, Juan Jose ; Vázquez, Manuel

Author_Institution

Dept. de Fisica de Mater., Univ. del Pais Vasco, San Sebastian, Spain

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2254

Lastpage

2256

Abstract

In this paper, we report on a considerable (up to about 18%) magnetoresistance (MR) effect in glass-coated Co-Cu microwires prepared from immiscible elements. Samples of Co₁₀Cu₉₀ microwires with a metallic nucleus diameter of 3-17 μm and total diameter up to 25 μm were prepared by the Taylor-Ulitovsky technique. The Co₁₀Cu₉₀ microwires generally consist of nanocrystals of Co and Cu with average grain size of about 40 nm, although the Co-phase content depends on the microwire geometry (metallic nucleus radius and glass-coating thickness). The magnetic field dependence of MR is completely anhysteretic, showing monotonous decay with the magnetic field.

Keywords

cobalt alloys; grain size; granular materials; magnetic fields; magnetoresistance; nanoparticles; nanowires; 25 micron; 3 to 17 micron; 40 nm; CoCu; Taylor-Ulitovsky technique; glass-coating thickness; grain size; granular glass-coated microwires; granular structure; immiscible elements; magnetic field; magnetoresistance effect; metallic nucleus radius; microwire geometry; monotonous decay; nanocrystalline microwires; nanocrystals; Amorphous magnetic materials; Coatings; Fabrication; Geometry; Giant magnetoresistance; Glass; Magnetic fields; Magnetic properties; Metastasis; Soft magnetic materials; Granular structure; immiscible elements; magnetoresistance; nanocrystalline microwires;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.830193

Filename

1325469