Structure and Magnetic Proporties of Polymer Matrix Nanocomposites

• Authors: M. Ławecka , M. Leonowicz , M. Kopcewicz , A. Ślawska-Waniewska , J. Kozubowski , G. Dzhardimalieva , A. Rosenberg , A. Pomogailo
• Languages of publication: EN

Abstracts

EN

Structure and magnetic properties of the thermal decomposition products of Fe(III)Co(II) acrylate complex were analysed. The crystalline phases, which were found in the fully processed material, at 643 K, were Fe_3O_4, CoFe_2O_4, and CoO and had a mean particle size of about 30 nm. In the intermediate stages of the thermolysis iron was present in a form of Fe^{III} (trivalent low-spin iron), Fe^{2+} (divalent high-spin iron), and Fe_3O_4. The coercivity and remanence were measured versus temperature in the range of 5-300 K, in 1.1 T applied field. Both, _MH_c and M_r, decreased showing room temperature values of 0.038 T and 7.49 mT, for coercivity and remanence, respectively. At temperatures below 200 K the hysteresis loops were asymmetrical, opened and shifted towards negative field values.

Keywords

EN

81.07.Bc; 82.35.Np

Discipline

• 82.35.Np: Nanoparticles in polymers(see also 81.07.-b Nanoscale materials and structures: fabrication and characterization)
• 81.07.Bc: Nanocrystalline materials

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2002
• Volume: 102
• Issue: 2
• Pages: 317-321

Dates

published

2002-08

received

2001-09-23

Contributors

author

M. Ławecka

• Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland

author

M. Leonowicz

• Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland

author

M. Kopcewicz

• Institute of Electronic Materials Technology, Warsaw, Poland

author

A. Ślawska-Waniewska

• Institute of Physics, Polish Academy of Sciences, Warsaw, Poland

author

J. Kozubowski

• Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warszawa, Poland

author

G. Dzhardimalieva

• Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia

author

A. Rosenberg

• Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia

author

A. Pomogailo

• Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia

References

• 1. A.D. Pomogailo, A.S. Rosenberg, Polym. Adv. Technol., 9, 527, 1998
• 2. T. Methasiri, K. Yoodee, I.M. Tang, Physica B, 101, 243, 1980
• 3. E. Berkowitz, R.H. Kodama, J. App. Phys., 81, 5552, 1997

Identifiers

DOI

10.12693/APhysPolA.102.317