Physics – Condensed Matter – Materials Science
Scientific paper
2006-06-30
Physics
Condensed Matter
Materials Science
Planned to Phys. Rev. Lett.*
Scientific paper
This letter reports our experimental results on magnetic-field-induced aftereffects in solution derived Bi4Fe2TiO12 film, in which e' decreases as much as 600 times after treated in a 5T magnetic field as that of the pristine one. The phenomena are explained by an unusual spin-orbital coupling in film, where strong magnetic field provides drive force for spin polarized electrons of electrode to enter film, so as to form a ferromagnetic orbital state, increase the relaxation time of defect dipoles and then produce giant magnetodielectric effects. This process is reversible just by applying a opposite 0.5T magnetic field. Our findings have potential applications on magnetic fabrication of nanopatterns somehow to evade nanohazard, as well as on integraged phononic or photonic crystals on chip.
Chu W. Y.
Lu Jianhua
Ma X. Q.
Qiao L. J.
Xu Fanrong
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