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Publication
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| Title of Article |
Influence of Ba substitution, Fe doping and annealing effect on magnetic and optical properties of Sr0.9Ba0.1Ti1−xFexO3 nanoparticles prepared by the hydrothermal method |
| Date of Acceptance |
27 February 2018 |
| Journal |
| Title of Journal |
Journal of Materials Science: Materials in Electronics |
| Standard |
SCOPUS |
| Institute of Journal |
Spinger US |
| ISBN/ISSN |
Doi.org/10.1007/s10854-018-8825-6 |
| Volume |
2018 |
| Issue |
29 |
| Month |
March |
| Year of Publication |
2018 |
| Page |
8188–8200 |
| Abstract |
Sr0.9Ba0.1Ti1−xFexO3 (x = 0, 0.05, 0.10 and 0.15) nanoparticles were synthesized by the hydrothermal method. Influence of Ba
substitution, Fe doping and annealing effect on magnetic and optical properties of these samples was studied. X-ray diffraction
(XRD) results indicated a cubic perovskite structure with the increase of lattice parameter and crystallite sizes of all samples
owing to the substitution with a larger ionic radius of Ba and Fe ions at Sr and Ti sites in the crystal structure, respectively.
Ba substitution could result in a pure phase of annealed samples. Magnetization of as-prepared samples measured at room
temperature by vibrating sample magnetometer (VSM) revealed a diamagnetic and paramagnetic behavior of undoped and
Fe-doped samples, respectively. Interestingly, annealing could significantly affect the magnetic behavior of all samples i.e.
undoped sample showed paramagnetic behavior, whereas all Fe-doped samples exhibited ferromagnetic behavior with the
enhancement of saturation magnetization (Ms) from 0.28 to 0.78 emu/g owing to the increase of Fe content. Ferromagnetic
behavior was suggested to originate from Fe3+−
VO−Fe3+ coupling in the crystal structure due to the promotion of oxygen
vacancy (VO) as confirmed by the X-ray photoelectron spectroscopy (XPS) results. Moreover, coercivity (Hc) and remanent
magnetization (Mr) also increased from 110–442 Oe to 0.01–0.15 emu/g, respectively. The determined optical band gaps of
annealed samples determined by ultraviolet–visible (UV–vis) spectroscopy were found to decrease from 3.3907 to 3.3469 eV
with increasing Fe content.
(XRD) results indicated a cubic perovskite structure with the increase of lattice parameter and crystallite sizes of all samples
owing to the substitution with a larger ionic radius of Ba and Fe ions at Sr and Ti sites in the crystal structure, respectively.
Ba substitution could result in a pure phase of annealed samples. Magnetization of as-prepared samples measured at room
temperature by vibrating sample magnetometer (VSM) revealed a diamagnetic and paramagnetic behavior of undoped and
Fe-doped samples, respectively. Interestingly, annealing could significantly affect the magnetic behavior of all samples i.e.
undoped sample showed paramagnetic behavior, whereas all Fe-doped samples exhibited ferromagnetic behavior with the
enhancement of saturation magnetization (Ms) from 0.28 to 0.78 emu/g owing to the increase of Fe content. Ferromagnetic
behavior was suggested to originate from Fe3+−
VO−Fe3+ coupling in the crystal structure due to the promotion of oxygen
vacancy (VO) as confirmed by the X-ray photoelectron spectroscopy (XPS) results. Moreover, coercivity (Hc) and remanent
magnetization (Mr) also increased from 110–442 Oe to 0.01–0.15 emu/g, respectively. The determined optical band gaps of
annealed samples determined by ultraviolet–visible (UV–vis) spectroscopy were found to decrease from 3.3907 to 3.3469 eV
with increasing Fe content. |
| Keyword |
Sr0.9Ba0.1Ti1−xFexO3 |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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