Percolation threshold and tunneling magnetoresistance in Ag/Ni nanocompacts

Author

Wu, S.Y. ; Liao, M.T. ; Huang, F.J. ; Tsao, F.C. ; Chung, M.K. ; Yang, C.C. ; Li, W.-H.

Author_Institution

Dept. of Phys., Nat. Central Univ., Chung-li, Taiwan

fYear

2005

fDate

4-8 April 2005

Firstpage

1053

Lastpage

1054

Abstract

The transport and magnetic behaviors of a series of seven two-component (Ag)_x(Ni)_100-x nanocompacts , each with a different Ag/Ni mass ratio, are studied with and without the presence of an applied magnetic field. A percolation threshold is found at 30% Ag concentration, higher than which metallic transport is observed. Using the tunneling magnetoresistance mechanism, the magnetorestrictive behaviors of the nanocompacts is investigated. It is observed that the TMR effects become diminshing in low Ni concentration nanocompacts.

Keywords

magnetostriction; nanoparticles; nickel alloys; percolation; silver alloys; tunnelling magnetoresistance; Ag_xNi_100-x; magnetorestrictive behaviors; mass ratio; metallic transport; percolation threshold; tunneling magnetoresistance; tunneling magnetoresistance mechanism; two-component nanocompacts; Composite materials; Conducting materials; Conductivity; Couplings; Electrons; Magnetic separation; Nanoparticles; Physics; Temperature; Tunneling magnetoresistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463956

Filename

1463956