Publication Type:Journal Article
Source:Applied Physics Letters, Volume 84, Number 16, p.3091-3093 (2004)
Keywords:Barium compounds, cobalt compounds, composition, fabrication, Ferroelectric materials, Ferromagnetism, Heterojunctions, Layered composites, Magnetization, Magnetoelectric effects, Multilayered structures, Nanometers, Permittivity, Piezoelectric materials, Piezoelectric phases, Quantum interference devices, thin films
The fabrication of a series of composition spreads consisting of ferroelectric BaTiO 3 and piezoelectric CoFe 2O 4 layers of varying thickness modulated at nanometer level in order to explore artificial magnetoresistance thin-film heterostructures was discussed. The scanning microwave microscopy and scanning superconducting quantum interference device microscopy were used for mapping the dielectric and magnetic properties as a function of continuously changing average composition across the spreads, respectively. The compositions in the middle of the spreads were found to exhibit ferromagnetism where as displaying a dielectric constant as high as ≈ 120.
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