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

Nikos Guskos

Nikos Guskos

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Guskos, Nikos
, 
Janusz Typek

Janusz Typek

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Typek, Janusz
, 
Grzegorz Zolnierkiewicz

Grzegorz Zolnierkiewicz

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Zolnierkiewicz, Grzegorz
, 
Aleksander Guskos

Aleksander Guskos

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Guskos, Aleksander
, 
Pawel Berczynski

Pawel Berczynski

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Berczynski, Pawel
, 
Diana Dolat

Diana Dolat

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Dolat, Diana
, 
Sylwia Mozia

Sylwia Mozia

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Mozia, Sylwia
, 
Konstantinos Aidinis

Konstantinos Aidinis

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Aidinis, Konstantinos
, 
Konrad Kruk

Konrad Kruk

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Kruk, Konrad
 und 
Antoni W. Morawski

Antoni W. Morawski

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Morawski, Antoni W.
  
27. Juni 2016
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Artikel-Kategorie: Research Article
Online veröffentlicht: 27. Juni 2016
Seitenbereich: 242 - 250
Eingereicht: 09. März 2015
Akzeptiert: 01. Feb. 2016
DOI: https://doi.org/10.1515/msp-2016-0042
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© Wroclaw University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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

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