| Title of Article |
Magnetic properties dependence on Fe2+/Fe3+ and oxygen vacancies in SrTi0.95Fe0.05O3 nanocrystalline prepared by hydrothermal method |
| Date of Acceptance |
30 March 2015 |
| Journal |
| Title of Journal |
Microelectronic Engineering |
| Standard |
ISI |
| Institute of Journal |
Elsevier |
| ISBN/ISSN |
Microelectronic Engineering |
| Volume |
2015 |
| Issue |
146 |
| Month |
March |
| Year of Publication |
2015 |
| Page |
92-98 |
| Abstract |
SrTi1xFexO3 (x = 0, 0.05, 0.10, 0.15 and 0.20) nanoparticles were synthesized by hydrothermal method.
SrTi0.95Fe0.05O3 samples were annealed at 500, 600 and 700 °C in Ar. X-ray diffraction (XRD) results indi-
cate a perovskite structure of all as-prepared and annealed samples with the impurity phase of SrCO3 and
Fe3O4 in as-prepared samples of x > 0.10. SEM micrograph of as-prepared SrTi0.95Fe0.05O3 reveals an
agglomeration of nanoparticles. TEM image shows a cubic shape of as-prepared SrTi0.95Fe0.05O3 nanopar-
ticles with an average size of 60.2 nm. X-ray absorption spectroscopy (XAS) and X-ray photoemission
spectroscopy (XPS) results of all annealed SrTi0.95Fe0.05O3 samples reveal, respectively the increasing of
Fe2+ cations and oxygen vacancies. Magnetic properties of as-prepared and all annealed samples were
measured using the vibrating sample magnetometer (VSM). Pure SrTiO3 exhibits diamagnetic behavior,
whereas as-prepared SrTi1xFexO3 (x = 0.05 and 0.10) samples exhibit ferromagnetic behavior and those
of x = 0.15 and 0.20 are paramagnetic. All annealed SrTi0.95Fe0.05O3 samples are ferromagnetic due to the
2+ 2 2+ 3+ 2 3+ F-center exchange (FCE) coupling interactions of Fe –VO –Fe and Fe –VO –Fe
, resulting in the max- imum magnetization value of 0.02 emu/g for SrTi0.95Fe0.05O3 sample annealed at 700 °C. |
| Keyword |
Fe-doped SrTiO3 Hydrothermal method Magnetic properties Fe2+/Fe3+ Oxygen vacancies |
| Author |
|
| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
false |
| Attach file |
|
| Citation |
0
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Publication
Journal Publication
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