Electric field controlled magnetization rotation in exchange biased　antiferromagnetic/ferromagnetic/piezoelectric composites

摘要

Electric field controlled rotation of the magnetization direction of a ferromagnet is investigated in the composite of antiferromagnetic (AF)/ferromagnetic (F)/piezoelectric (PE) layers. Usually, simple 90° magnetization switching is reported with uniaxial F/PE composites. In contrast, when considering unidirectional anisotropy in exchange-biased AF/F systems, a controllable rotation of the magnetization direction in F can be achieved. Here, we show a composite which differs by using in-plane d_(33) deformation mode with standard magnetic electrodes. We report the experimental evidence of magnetization continuous rotation in IrMn/CoFeB/PZT composites leading to technological impacts on memories, sensors, and microwave devices.