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Magnetic studies of 0.7(Fe2O3)/0.3(ZnO) nanocomposites in nanopowder form and dispersed in polymer matrix

Janusz Typek
Janusz Typek
, 
Kamil Wardal
Kamil Wardal
, 
Grzegorz Zolnierkiewicz
Grzegorz Zolnierkiewicz
, 
Anna Szymczyk
Anna Szymczyk
, 
Nikos Guskos
Nikos Guskos
, 
Urszula Narkiewicz
Urszula Narkiewicz
 y 
Elzbieta Piesowicz
Elzbieta Piesowicz
   | 24 may 2016
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Article Category: Research Article
Publicado en línea: 24 may 2016
Páginas: 286 - 296
Recibido: 20 may 2015
Aceptado: 11 ene 2016
DOI: https://doi.org/10.1515/msp-2016-0032
© 2016 Wroclaw University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

SEM (left) and TEM (right) images of 0.7(Fe2O3)/0.3(ZnO) nanopowder.
SEM (left) and TEM (right) images of 0.7(Fe2O3)/0.3(ZnO) nanopowder.

Fig. 2

Temperature dependence of the magnetic susceptibility in ZFC and FC modes of 0.7(Fe2O3)/0.3(ZnO) nanopowder (a) and dispersed in polymer 0.7(Fe2O3)/0.3(ZnO) (b) measured in two different magnetic fields (100 Oe and 1000 Oe).
Temperature dependence of the magnetic susceptibility in ZFC and FC modes of 0.7(Fe2O3)/0.3(ZnO) nanopowder (a) and dispersed in polymer 0.7(Fe2O3)/0.3(ZnO) (b) measured in two different magnetic fields (100 Oe and 1000 Oe).

Fig. 3

Isothermal magnetization M(H) of nanopowder sample (a, b) and polymer sample (c, d). Solid line in (a) for T = 290 K is the fit to the modified Langevin function. (b) and (d) present magnetization in low magnetic fields (hysteresis loops).
Isothermal magnetization M(H) of nanopowder sample (a, b) and polymer sample (c, d). Solid line in (a) for T = 290 K is the fit to the modified Langevin function. (b) and (d) present magnetization in low magnetic fields (hysteresis loops).

Fig. 4

FMR spectra of 0.7(Fe2O3)/0.3(ZnO) nanopowder (a, b) and dispersed in polymer 0.7(Fe2O3)/0.3(ZnO) (c, d) recorded at a few different temperatures.
FMR spectra of 0.7(Fe2O3)/0.3(ZnO) nanopowder (a, b) and dispersed in polymer 0.7(Fe2O3)/0.3(ZnO) (c, d) recorded at a few different temperatures.

Fig. 5

Integrated intensity (left axis) of nanopowder (full squares) and polymer (full triangles) samples, and apparent resonance field (right axis) of nanopowder (open squares) and polymer (open triangles) samples.
Integrated intensity (left axis) of nanopowder (full squares) and polymer (full triangles) samples, and apparent resonance field (right axis) of nanopowder (open squares) and polymer (open triangles) samples.

Fig. 6

Experimental (dots) and fitted (line) FMR spectra, with two components of fitted line of 0.7(Fe2O3)/0.3(ZnO) nanocomposite at 15 K (a), 290 K (b) and the nanocomposite doped in the polymer PEN-b-PTMO at 17 K (c), 290 K (d).
Experimental (dots) and fitted (line) FMR spectra, with two components of fitted line of 0.7(Fe2O3)/0.3(ZnO) nanocomposite at 15 K (a), 290 K (b) and the nanocomposite doped in the polymer PEN-b-PTMO at 17 K (c), 290 K (d).

Fig. 7

Temperature dependence of the calculated true resonance field of the nanopowder (full and open squares) and the polymer (full and open triangles) samples.
Temperature dependence of the calculated true resonance field of the nanopowder (full and open squares) and the polymer (full and open triangles) samples.

Fig. 8

Temperature dependence of the calculated true linewidth of the nanopowder (full and open squares) and the polymer (full and open triangles) samples.
Temperature dependence of the calculated true linewidth of the nanopowder (full and open squares) and the polymer (full and open triangles) samples.

Fig. 9

Temperature dependence of the effective anisotropy field Ha calculated from equation 3 for both types of samples.
Temperature dependence of the effective anisotropy field Ha calculated from equation 3 for both types of samples.

Fig. 10

Heat flow of neat PEN-b-PTMO (full squares) and PEN-b-PTMO containing 0.1 % of the nanopowder (full triangles), mass loss of neat PEN-b-PTMO (open squares) and PEN-b-PTMO containing 0.1 % of the nanopowder (open triangles), in air (a) and in argon (b) atmosphere.
Heat flow of neat PEN-b-PTMO (full squares) and PEN-b-PTMO containing 0.1 % of the nanopowder (full triangles), mass loss of neat PEN-b-PTMO (open squares) and PEN-b-PTMO containing 0.1 % of the nanopowder (open triangles), in air (a) and in argon (b) atmosphere.
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