Magneto-optical imaging of voltage-controlled magnetization reorientation

Abstract

We study the validity and limitations of a macrospin model to describe the voltage-controlled manipulation of ferromagnetic magnetization in nickel thin film/piezoelectric actuator hybrid structures. To this end, we correlate simultaneously measured spatially resolved magneto-optical Kerr effect imaging and integral magnetotransport measurements at room temperature. Our results show that a macrospin approach is adequate to model the magnetoresistance as a function of the voltage applied to the hybrid, except for a narrow region around the coercive field - where the magnetization reorientation evolves via domain effects. Thus, on length scales much larger than the typical magnetic domain size, the voltage control of magnetization is well reproduced by a simple Stoner-Wohlfarth type macrospin model.

References in corpus (5)

• Giant sharp magnetoelectric switching in multiferroic epitaxial La_{0.67}Sr_{0.33}MnO_3 on BaTiO_3
• Voltage controlled inversion of magnetic anisotropy in a ferromagnetic thin film at room temperature
• Nonvolatile ferroelectric control of ferromagnetism in (Ga,Mn)As
• Piezo-control of magnetic anisotropy in GaMnAs: Reversible manipulation of magnetization orientation and irreversible magnetization switching
• Magnetic microstructure and magnetotransport in Co2FeAl Heusler compound thin films

Cited by in corpus (4)

• Voltage-induced strain control of the magnetic anisotropy in a Ni thin film on flexible substrate
• Converse Magnetoelectric Effects in Fe3O4/BaTiO3 Multiferroic Hybrids
• Multistate nonvolatile straintronics controlled by a lateral electric field
• Electrical Writing of Magnetic and Resistive Multistates in CoFe Films Deposited onto Pb[Zr${}_x$Ti${}_{1-x}$]O${}_3$