TY - JOUR KW - Thin films KW - Composition KW - Fabrication KW - Cobalt compounds KW - Ferromagnetism KW - Ferroelectric materials KW - Permittivity KW - Magnetization KW - Heterojunctions KW - Piezoelectric materials KW - Magnetoelectric effects KW - Barium compounds KW - Nanometers KW - Layered composites KW - Multilayered structures KW - Piezoelectric phases KW - Quantum interference devices AU - K.-S Chang AU - M.A Aronova AU - C.-L Lin AU - M Murakami AU - M.-H Yu AU - J R Hattrick-Simpers AU - O.O Famodu AU - S.Y Lee AU - Ramamoorthy Ramesh AU - M Wuttig AU - I Takeuchi AU - C Gao AU - L.A Bendersky AB - 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. BT - Applied Physics Letters DO - 10.1063/1.1699474 LA - eng M1 - 16 N1 - cited By 74 N2 - 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. PY - 2004 SP - 3091 EP - 3093 T2 - Applied Physics Letters TI - Exploration of artificial multiferroic thin-film heterostructures using composition spreads VL - 84 SN - 00036951 ER -