Exploration of artificial multiferroic thin-film heterostructures using composition spreads

Journal Article

Chang, K.-S, M.A Aronova, C.-L Lin, M Murakami, M.-H Yu, J R Hattrick-Simpers, O.O Famodu, S.Y Lee, Ramamoorthy Ramesh, M Wuttig, I Takeuchi, C Gao, L.A Bendersky

10.1063/1.1699474

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.

Applied Physics Letters

84

2004

00036951

cited By 74

Ramesh Lab