Ion synthesis and FMR studies of iron and cobalt nanoparticles in polyimides

B. Z. Rameeva, b, F. Yildiza, B. AktaImagea, C. Okayc, R. I. Khaibullina, b, E. P. Zheglovb, J. C. Pivind and L. R. TagirovCorresponding Author Contact Information, E-mail The Corresponding Author, a, b, e

a Gebze Institute of Technology, 41400, Gebze-Kocaeli, Turkey
b Kazan Physical-Technical Institute, Sibirsky Trakt 10/7, 420029, Kazan, Russia
c Marmara University, 81040, Göztepe-Istanbul, Turkey
d CSNSM, Batiment 108, IN2P3-CNRS, 91405, Orsay Campus, France
e Kazan State University, Kremlevskaya str. 18, 420008, Kazan, Russia

Available online 14 June 2003.


Polyimide foils were implanted with 40 keV Fe+ and Co+ to doses of 0.25–1.5×1017 ions/cm2. Electron microscopy studies showed the formation of iron and cobalt nanoparticles in the implanted polymer layer with a thickness of about 70 nm. The size and shape of the ion-synthesized metal nanoparticles depend on the implantation parameters and subsequent thermal annealing. A ferromagnetic resonance (FMR) response was found in the iron-implanted samples as well as in the annealed cobalt and iron samples. The effective magnetization values of the metal/polymer composite layers were extracted from the FMR spectra and plotted as a function of implantation dose. The magnetic properties of the iron and cobalt nanoparticles in polyimide are compared and discussed.

Author Keywords: Ion implantation; Magnetic nanoparticles; Granular magnetic films; Ferromagnetic resonance

PACS classification codes: 75.50.Tt; 75.70.-i; 76.30.Fc; 76.50.+g

Corresponding Author Contact InformationCorresponding author. Kazan State University, Kremlevskaya str. 18, 420008 Kazan, Russia. Tel./fax: +7-8432-381-573.