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Descripción
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| Ti-doped BiFeO3 ceramics prepared by a mixed-oxide route were structurally characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM), giving evidence of the formation of an inner structure at the nanometric scale. The observed nanograins are separated by Ti-rich areas that originate due to the tendency of the titanium dopant to segregate from the perovskite lattice. Such a peculiar nanostructure is responsible for the changes produced in both the electrical and the magnetic properties of BiFeO3 upon titanium doping: the Ti-rich interfaces act as resistive layers that increase the direct-current (dc) resistivity of the material, while the existence of structural domains in the scale of tens of nanometers causes a ferrimagnetic-like behavior with a huge coercive field (on the order of 20 kOe), even at room temperature. | |
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Internacional
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Si |
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JCR del ISI
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Si |
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Título de la revista
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CHEMISTRY OF MATERIALS |
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ISSN
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0897-4756 |
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Factor de impacto JCR
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8,238 |
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Información de impacto
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Volumen
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25 |
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DOI
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10.1021/cm303743h |
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Número de revista
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9 |
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Desde la página
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1533 |
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Hasta la página
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1541 |
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Mes
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SIN MES |
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Ranking
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CHEMISTRY, PHYSICAL 135 9 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY 241 13 Q1 |