Interface electronic structures of BaTiO3@X nanoparticles (X=gamma-Fe2O3, Fe3O4, alpha-Fe2O3, and Fe) investigated by XAS and XMCD
- Title
- Interface electronic structures of BaTiO3@X nanoparticles (X=gamma-Fe2O3, Fe3O4, alpha-Fe2O3, and Fe) investigated by XAS and XMCD
- Authors
- KIM, D. H.; LEE, H. J.; KIM, G.; KOO, Y. S.; JUNG, J. H.; SHIN, H. J.; KIM, J. -Y.; KANG, J. -S.; null
- Date Issued
- 2009-01
- Publisher
- AMER PHYS
- Abstract
- The electronic structures of BaTiO3@X (core@shell) nanoparticles (X=gamma-Fe2O3, Fe3O4, and Fe) have been investigated by employing soft x-ray-absorption spectroscopy and x-ray magnetic circular dichroism (XMCD). It is found that the valence states of Ti ions near interfaces are formally tetravalent (Ti4+:3d(0)) and that the valence states of Fe ions in shells are essentially the same as those of the corresponding bulk materials, with some disorder in the site occupations for X=gamma-Fe2O3 and Fe3O4. The negligible Ti 2p XMCD signals were observed, indicating that the induced spin polarization of the interface Ti 3d electrons is negligible in BaTiO3@X nanoparticles.
- Keywords
- barium compounds; electronic structure; iron compounds; magnetic circular dichroism; nanoparticles; spin polarised transport; X-ray absorption spectra; X-RAY-ABSORPTION; TRANSITION-METAL COMPOUNDS; OCTAHEDRAL SYMMETRY; CIRCULAR-DICHROISM; SPECTROSCOPY; OXIDES; IRON
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29200
- ISSN
- 1098-0121
- Article Type
- Article
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- There are no files associated with this item.
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