Electrically tunable transport and high-frequency dynamics in antiferromagnetic Sr3Ir2O7

Heidi Seinige, Morgan Williamson, Shida Shen, Cheng Wang, Gang Cao, Jianshi Zhou, John B. Goodenough, Maxim Tsoi

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


We report dc and high-frequency transport properties of antiferromagnetic Sr3Ir2O7. Temperature-dependent resistivity measurements show that the activation energy of this material can be tuned by an applied dc electrical bias. The latter allows for continuous variations in the sample resistivity of as much as 50% followed by a reversible resistive switching at higher biases. Such a switching is of high interest for antiferromagnetic applications in high-speed memory devices. Interestingly, we found the switching behavior to be strongly affected by a high-frequency (microwave) current applied to the sample. The microwaves at 3-7 GHz suppress the dc switching and produce resonancelike features that we tentatively associated with the dissipationless magnonics recently predicted to occur in antiferromagnetic insulators subject to ac electric fields. We have characterized the effects of microwave irradiation on electronic transport in Sr3Ir2O7 as a function of microwave frequency and power, strength and direction of external magnetic field, strength and polarity of applied dc bias, and temperature. Our observations support the potential of antiferromagnetic materials for high-speed/high-frequency spintronic applications.
Original languageEnglish (US)
JournalPhysical Review B
Issue number21
StatePublished - Dec 29 2016
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2021-04-05
Acknowledged KAUST grant number(s): OSR-2015-CRG4-2626
Acknowledgements: This work was supported in part by C-SPIN, one of six centers of STARnet, a Semiconductor Research Corporation program, sponsored by MARCO and DARPA, by NSF Grants No. DMR-1207577, No. DMR-1265162, No. DMR-1600057, and No. DMR-1122603, and by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2015-CRG4-2626.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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