All-optical helicity-dependent switching in NiCo${}_2$O${}_4$ thin films

Abstract

All-optical switching (AOS) involves manipulating magnetization using only pulsed laser, presenting a promising approach for next-generation magnetic recording devices. NiCo2O4 (NCO) thin films, a rare-earth-free ferrimagnetic oxide, exhibit a high Curie temperature and strong perpendicular magnetic anisotropy. This study demonstrates AOS in NCO thin films at room temperature using long-duration laser pulses and high repetition rates. Unlike previous findings, the AOS phenomena we report here are helicity-dependent and observable with an ultrashort pulsed laser. Consequently, two distinct types of AOS can be observed in a single NCO thin film, contingent on the characteristics of the laser pulses and temperature.

5 pages, 4 figures

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Cited by in corpus (3)

• High-mobility inertial domain walls driven by spin-transfer torque in a ferrimagnetic spinel oxide
• Type-II-like ultrafast demagnetization behavior in NiCo2O4 thin films
• Recent Progress in Ultrafast Dynamics of Transition-Metal Compounds Studied by Time-Resolved X-ray Techniques