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High frequency simulation of granular CoFeHfO nanometric thin films

D. IONESCU1, B. CIOBANU2,*

Affiliation

  1. Gh. Asachi Technical University of Iaşi, Faculty of Electronics and Telecommunications, 11 Carol I Blvd., 700506 Iaşi, Romania
  2. Gh. Asachi Technical University of Iaşi, Department of Physics, 67 D. Mangeron Blvd., 700050 Iaşi, Romania

Abstract

The granular CoFeHfO material with good soft magnetic properties has been analyzed. This magnetic material is used like thin films with nano-metric thickness, deposed by reactive sputtering on a printed circuit board substrate surface planarized beforehand by chemical-mechanical polishing. Our study is performed in order to determine the electric and magnetic properties of efficient package-compatible magnetic materials, which are needed for exploitation of magnetic passive components and devices. Two important material parameters have been determined: relative effective electric permittivity and relative magnetic permeability, using a simulation method in the frequency range of 2.45 - 9.8 GHz. The material parameters have been calculated according to an algorithm based on physical considerations, applied for the material samples exposed to a testing electromagnetic field. Our new contribution is to illustrate the resonant character of the frequency behavior for the material parameters (the effective electric permittivity and the magnetic permeability). This resonant behavior is connected with the microscopic internal structures of the samples, depending on its geometry, internal order and nature..

Keywords

Granular CoFeHfO, Nano-metric thin films, Relative effective electric permittivity and relative magnetic permeability, Physical algorithm, Resonant high-frequency behavior, Internal order.

Submitted at: Nov. 12, 2007
Accepted at: Oct. 7, 2008

Citation

D. IONESCU, B. CIOBANU, High frequency simulation of granular CoFeHfO nanometric thin films, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 10, pp. 2678-2683 (2008)