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ข้อมูลการเผยแพร่ผลงาน
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| ชื่อบทความ |
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 |
| วัน/เดือน/ปี ที่ได้ตอบรับ |
27 กุมภาพันธ์ 2561 |
| วารสาร |
| ชื่อวารสาร |
Journal of Materials Science: Materials in Electronics |
| มาตรฐานของวารสาร |
SCOPUS |
| หน่วยงานเจ้าของวารสาร |
Spinger US |
| ISBN/ISSN |
Doi.org/10.1007/s10854-018-8825-6 |
| ปีที่ |
2018 |
| ฉบับที่ |
29 |
| เดือน |
March |
| ปี พ.ศ. ที่พิมพ์ |
2561 |
| หน้า |
8188–8200 |
| บทคัดย่อ |
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. |
| คำสำคัญ |
Sr0.9Ba0.1Ti1−xFexO3 |
| ผู้เขียน |
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| การประเมินบทความ |
มีผู้ประเมินอิสระ |
| สถานภาพการเผยแพร่ |
ตีพิมพ์แล้ว |
| วารสารมีการเผยแพร่ในระดับ |
นานาชาติ |
| citation |
มี |
| เป็นส่วนหนึ่งของวิทยานิพนธ์ |
เป็น |
| แนบไฟล์ |
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| Citation |
0
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