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Temperature study of magnetic resonance spectra of co-modified (Co,N)-TiO2 nanocomposites

Materials Science-Poland
Volume 34 (2016): Issue 2 (June 2016)
By:
Open Access
|Jun 2016

Figures & Tables

Fig. 1

The FMR/EPR spectra of (a) 1Co,N-TiO2, (b) 5Co,N-TiO2, and (c) 10Co,N-TiO2 nanocomposites at different temperatures. Right panels present spectra in the low temperature range (T < 70 K), left panels in the high temperature range (T > 70 K).
The FMR/EPR spectra of (a) 1Co,N-TiO2, (b) 5Co,N-TiO2, and (c) 10Co,N-TiO2 nanocomposites at different temperatures. Right panels present spectra in the low temperature range (T < 70 K), left panels in the high temperature range (T > 70 K).

Fig. 2

Experimental (open squares) and fitted (solid lines) magnetic resonance spectra of (a) 1Co,N-TiO2, (b) 5Co,N-TiO2, and (c) 10Co,N-TiO2 nanocomposites at 90 K.
Experimental (open squares) and fitted (solid lines) magnetic resonance spectra of (a) 1Co,N-TiO2, (b) 5Co,N-TiO2, and (c) 10Co,N-TiO2 nanocomposites at 90 K.

Fig. 3

Experimental FMR spectrum of 10Co,N-TiO2 sample at T = 90 K (open squares) and fitted four components (solid lines designated 1 to 4).
Experimental FMR spectrum of 10Co,N-TiO2 sample at T = 90 K (open squares) and fitted four components (solid lines designated 1 to 4).

Fig. 4

Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 1Co,N-TiO2 nanocomposite.
Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 1Co,N-TiO2 nanocomposite.

Fig. 5

Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 5Co,N-TiO2 nanocomposite.
Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 5Co,N-TiO2 nanocomposite.

Fig. 6

Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 10Co,N-TiO2 nanocomposite.
Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 10Co,N-TiO2 nanocomposite.

Fig. 7

Temperature dependence of the integrated intensity of center A (open circles) and B (open squares) in 5Co,N-TiO2 nanocomposite.
Temperature dependence of the integrated intensity of center A (open circles) and B (open squares) in 5Co,N-TiO2 nanocomposite.

Anisotropy fields for centers A and B at high (270 K) and low temperature (5 K)_

Nanocomposite

Temperature 270 K

Temperature 5 K

Anisotropy field of center A [kG]

Anisotropy field of center B [kG]

Anisotropy field of center A [kG]

Anisotropy field of center B [kG]

1Co,N-TiO2

3

~0

6

2

5Co,N-TiO2

4.5

2.5

6

3

10Co,N-TiO2

5.5

2

6

3

DOI: https://doi.org/10.1515/msp-2016-0042 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 242 - 250
Submitted on: Mar 9, 2015
Accepted on: Feb 1, 2016
Published on: Jun 27, 2016
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
nano titanium dioxide,
electron paramagnetic resonance,
photocatalyst
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2016 Nikos Guskos, Janusz Typek, Grzegorz Zolnierkiewicz, Aleksander Guskos, Pawel Berczynski, Diana Dolat, Sylwia Mozia, Konstantinos Aidinis, Konrad Kruk, Antoni W. Morawski, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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