Ultrawide broadband rectification effect in an in-plane magnetic tunnel junction

Broadband voltage rectification is an interesting effect that was recently discovered in magnetic tunnel junction (MTJ) structures. Usually, this effect occurs for certain types of MTJ structures and for special configurations of the external magnetic field (namely, perpendicular to the plane component of magnetization). We report on an alternative type of broadband rectification effect with a frequency range up to 6 GHz that is observed in MTJ samples with in-plane magnetization and without an external out-of-plane magnetic field. We compare the experimental study with numerical calculations and theoretical analysis to explain the results. Furthermore, we demonstrated that for the appearance of broadband rectification, it is sufficient to create a nonzero equilibrium angle between the polarizer and the free layer. Our work paves the way for improved energy efficiency in wireless microwave energy-harvesting applications.