Properties of melt‐spun Co15Fe5Cu80, a bulk granular magnetic solid (abstract)
- 15 May 1993
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 73 (10) , 5540
- https://doi.org/10.1063/1.353642
Abstract
We have investigated the magnetic and transport properties of melt‐spun Co15Fe5Cu80 as a function of heat treatment. Recently Xiao, Jiang, and Chien1 reported clustering and giant magnetoresistance in thin films of related alloys prepared by sputtering. We report qualitatively similar phenomena in these rapidly quenched ribbons. The unannealed samples exhibited saturation magnetoresistance of 0.2%. Annealing at 500 °C for 15 min in hydrogen increases the room temperature for magnetoresistance to 3%, and lowering the temperature to 77 K increased the magnetoresistance to 12.6%. Ferromagnetic resonance measurements at 35 GHz were also made. At room temperature the unannealed sample displayed a very broad resonance centered at 10 kG, consistent with a broad distribution of single domain particles of roughly spherical shape and an overall global magnetization 4πM=3.5 kOe. As the annealing temperature increases, the single domain particles with an inhomogeneous linewidth of ∼2 kOe grow into multidomain particles with a linewidth of ∼6 kOe.This publication has 0 references indexed in Scilit: