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GIANT MAGNETORESISTANCE EFFECTS IN CORRELATION WITH LOCAL MAGNETIC INTERACTIONS IN Fe-Cu AND Co-Cu GRANULAR THIN FILMS PREPARED BY THERMIONIC VACUUM ARC METHOD

C. P. Lungu1,* , I. Mustata1, A. M. Lungu1, O. Brinza1, V. Zaroschi1, V. Kuncser2, G. Filoti2, L. Ion3

Affiliation

  1. National Institute for Lasers, Plasma and Radiation Physics, 77125, Bucharest-Magurele, Romania
  2. National Institute for Materials Physics, 77125, Bucharest- Magurele, Romania
  3. University of Bucharest, Faculty of Physics, 77125, Bucharest- Magurele, Romania

Abstract

The simultaneous discharge of Fe (or Co) and, respectively, Cu metal sources via thermionic vacuum arc (TVA) was used as a new processing method to obtain granular magneto resistive films. The nano-structured films with thicknesses of 120 ± 1 nm and 250 ± 1 nm were obtained in definite conditions and subsequently characterized via electrical measurements at room temperature, in applied magnetic field. The paper reveals the importance of different specific factors (from size and dispersion effects to annealing influence) on the magnetoresistance behavior. A special contribution of the Mössbauer Spectroscopy, concerning the local structure and interactions as well as the magnetic phase characterization, was emphasized..

Keywords

Giant magnetoresistance, Fe-Cu, Co-Cu, Grnular thin films, Thermoionic vacuum arc method.

Submitted at: May 6, 2005
Accepted at: Sept. 22, 2005

Citation

C. P. Lungu, I. Mustata, A. M. Lungu, O. Brinza, V. Zaroschi, V. Kuncser, G. Filoti, L. Ion, GIANT MAGNETORESISTANCE EFFECTS IN CORRELATION WITH LOCAL MAGNETIC INTERACTIONS IN Fe-Cu AND Co-Cu GRANULAR THIN FILMS PREPARED BY THERMIONIC VACUUM ARC METHOD, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 5, pp. 2507-2512 (2005)