Direct measurement of magnetoelectric exchange in self-assembled epitaxial BiFeO3-CoFe2O4 nanocomposite thin films

作者：Yan Li^*; Xing Zengping; Wang Zhiguang; Wang Tao; Lei Guangyin; Li Jiefang; Viehland D

来源：Applied Physics Letters, 2009, 94(19): 192902.

DOI：10.1063/1.3138138

• bismuth compounds
• cobalt compounds
• dielectric polarisation
• magnetic epitaxial layers
• magnetic hysteresis
• magnetoelectric effects
• nanocomposites
• piezoelectric thin films

We report the direct measurement of a magnetoelectric (ME) exchange between magnetostrictive CoFe2O4 nanopillars in a piezoelectric BiFeO3 matrix for single-layer nanocomposite epitaxial thin films grown on (001) SrTiO3 substrates with SrRuO3 bottom electrodes. The ME coefficient was measured by a magnetic cantilever method and had a maximum value of similar to 20 mV/cm Oe. The films possessed saturation polarization (60 mu C/cm(2)) and magnetization (410 emu/cc) properties equivalent to bulk values, with typical hysteresis loops.

• 出版日期2009-5-11
• 单位美国弗吉尼亚理工大学(Virginia Tech)