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Voltage controlled magnetic anisotropy (VCMA) is a low-energy alternative tomanipulate the ferromagnetic state, which has been recently considered also inantiferromagnets (AFMs). Here, we theoretically demonstrate that VCMA can beused to excite linear and parametric resonant modes in easy-axis AFMs withperpendicular anisotropy, thus opening the way for an efficient electricalcontrol of the Neel vector, and for detection of high-frequency dynamics. Ourwork leads to two key results: (i) VCMA parametric pumping experiences theso-called exchange enhancement of the coupling efficiency and, thus, is 1-2orders of magnitude more efficient than microwave magnetic fields orspin-orbit-torques, and (ii) it also allows for zero-field parametricresonance, which cannot be achieved by other parametric pumping mechanisms inAFMs with out-of-plane easy axis. Therefore, we demonstrate that the VCMAparametric pumping is the most promising method for coherent excitation andmanipulation of AFM order in perpendicular easy-axis AFMs.

Antiferromagnetic parametric resonance driven by voltage-controlled magnetic anisotropy