TY - JOUR
T1 - Antiferromagnetic Parametric Resonance Driven by Voltage-Controlled Magnetic Anisotropy
AU - Tomasello, Riccardo
AU - Verba, Roman
AU - Lopez-Dominguez, Victor
AU - Garesci, Francesca
AU - Carpentieri, Mario
AU - Di Ventra, Massimiliano
AU - Khalili Amiri, Pedram
AU - Finocchio, Giovanni
N1 - Funding Information:
This work is supported under Grant No. 2019-1-U.0. (“Diodi spintronici rad-hard ad elevata sensitività-DIOSPIN”) funded by the Italian Space Agency (ASI) within the call “Nuove idee per la componentistica spaziale del futuro,” and Project No. PRIN 2020LWPKH7 funded by the Italian Ministry of University and Research. R.V. acknowledges support by the Ministry of Education and Science of Ukraine (Project No. 0121U110090). This work is also supported by a grant from the U.S. National Science Foundation, Division of Electrical, Communications and Cyber Systems (NSF Grant No. ECCS-1853879) and by the National Science Foundation Materials Research Science and Engineering Center at Northwestern University (NSF Grant No. DMR-1720319). M.D. acknowledges support from the DOE under Grant No. DE-SC0020892. The work of R.T. at Northwestern University is sponsored by the Petaspin Association .
Publisher Copyright:
© 2022 American Physical Society.
PY - 2022/3
Y1 - 2022/3
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevApplied.17.034004
DO - 10.1103/PhysRevApplied.17.034004
M3 - Article
AN - SCOPUS:85126668736
VL - 17
JO - Physical Review Applied
JF - Physical Review Applied
SN - 2331-7019
IS - 3
M1 - 034004
ER -