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The influence of the thickness layers and annealing conditions on the hard magnetic properties of nanocomposite [NdFeBNbCu/FeBSi]xn films

H. CHIRIAC1, M. GRIGORAS1, N. LUPU1, M. URSE1,*

Affiliation

  1. National Institute of Research & Development for Technical Physics, 47 Mangeron Blvd., 700050 Iasi, Romania

Abstract

Some results concerning the influence of the thicknesses ratio of the NdFeBNbCu/FeBSi bilayers and annealing conditions on the structural and hard magnetic properties of the a/[NdFeBNbCu/FeBSi]⋅n/Ta multilayer thin films with low crystallization temperature are presented. The good hard magnetic characteristics were obtained for the Ta/[NdFeBNbCu(90)/FeBSi(5)]⋅6/Ta thin films annealed at 630o C for 20 min., and then cooled up down to RT in magnetic field. Thus, the Ta[NdFeBNbCu(90nm)/FeBSi(5nm)]⋅6/Ta thin films annealed for 20 min. at 630oC and then cooled up down to RT in magnetic field of 8 kG exhibit an increase in coercivity of about 1.37 kG and a noticeable enhancement of the saturation magnetization and the remanent magnetization of about 12 emu/g and 22 emu/g, respectively, as compared with same sample annealed at 630oC for 20 min., and then cooled up down to RT without magnetic field..

Keywords

Thin films, Nanocomposite, Hard magnetic materials, Thickness layer, Multilayer, Annealing conditions, Soft and hard phases.

Submitted at: Nov. 7, 2008
Accepted at: Dec. 10, 2008

Citation

H. CHIRIAC, M. GRIGORAS, N. LUPU, M. URSE, The influence of the thickness layers and annealing conditions on the hard magnetic properties of nanocomposite [NdFeBNbCu/FeBSi]xn films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 12, pp. 3501-3504 (2008)