Antiferromagnets can extend the working frequency of spintronics to THz range while using similar geometries and concepts of GHz ferromagnet-based spintronic devices. Here we investigate micromagnetically the dynamics of spin-Hall oscillators driven by the simultaneous action of a dc and an ac current. Our findings include the clear occurrence of three types of dynamics, depending on the frequency of the ac with respect to the self-oscillation frequency excited by the dc: (i) frequency modulation, (ii) frequency pulling and, (iii) injection locking. These results confirm the suitability of antiferromagnets for the development of a THz technology which can impact the field of telecommunications.
Modulation, injection locking, and pulling in an antiferromagnetic spin-orbit torque oscillator / Puliafito, V.; Sanchez-Tejerina, L.; Carpentieri, M.; Azzerboni, B.; Finocchio, G.. - In: IEEE TRANSACTIONS ON MAGNETICS. - ISSN 0018-9464. - STAMPA. - 57:2(2021). [10.1109/TMAG.2020.3014576]
Modulation, injection locking, and pulling in an antiferromagnetic spin-orbit torque oscillator
Puliafito, V.;Carpentieri, M.;
2021-01-01
Abstract
Antiferromagnets can extend the working frequency of spintronics to THz range while using similar geometries and concepts of GHz ferromagnet-based spintronic devices. Here we investigate micromagnetically the dynamics of spin-Hall oscillators driven by the simultaneous action of a dc and an ac current. Our findings include the clear occurrence of three types of dynamics, depending on the frequency of the ac with respect to the self-oscillation frequency excited by the dc: (i) frequency modulation, (ii) frequency pulling and, (iii) injection locking. These results confirm the suitability of antiferromagnets for the development of a THz technology which can impact the field of telecommunications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
