Antiferromagnetic Parametric Resonance Driven by Voltage-Controlled Magnetic Anisotropy

Riccardo Tomasello, Roman Verba, Victor Lopez-Dominguez, Francesca Garesci, Mario Carpentieri, Massimiliano Di Ventra, Pedram Khalili Amiri, Giovanni Finocchio

Research output: Contribution to journalArticlepeer-review

Abstract

Voltage-controlled magnetic anisotropy (VCMA) is a low-energy alternative to manipulate the ferromagnetic state, which has been recently also considered in antiferromagnets (AFMs). Here, we theoretically demonstrate that VCMA can be used to excite linear and parametric resonant modes in easy-axis AFMs with perpendicular anisotropy, thus opening the way for an efficient electrical control of the Néel vector and for the detection of high-frequency dynamics. Our work leads to two key results: (i) VCMA parametric pumping experiences the so-called "exchange enhancement"of the coupling efficiency and, thus, is 1-2 orders of magnitude more efficient than microwave magnetic fields or spin-orbit torques, and (ii) it also allows for zero-field parametric resonance, which cannot be achieved by other parametric pumping mechanisms in AFMs with an out-of-plane easy axis. Therefore, we demonstrate that VCMA parametric pumping is the most promising method for coherent excitation and manipulation of AFM order in perpendicular easy-axis AFMs.

Original languageEnglish (US)
Article number034004
JournalPhysical Review Applied
Volume17
Issue number3
DOIs
StatePublished - Mar 2022

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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