  Magnetic hysteresis loops show a moderate perpendicular anisotropy of the
magnetostrictive CFO pillars, which is related to their vertical compression.
The application of an electric field to the electromechanical PMN-PT substrate
produced significant and reversible changes in the magnetization due to an
additional strain-induced magnetic anisotropy. This demonstrates completely
reversible, room-temperature electric-field-assisted control of magnetization
in self-assembled vertical nanocomposites of CFO and BFO.
