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

Autor:	Takahashi, Ryunosuke, Guen, Yann Le, Nakata, Suguru, Igarashi, Junta, Hohlfeld, Julius, Malinowski, Grégory, Lingling, Xie, Daisuke, Kan, Shimakawa, Yuichi, Mangin, Stéphane, Wadati, Hiroki
Rok vydání:	2024
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	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. Comment: 5 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2409.01615 Zobrazit plný text záznamu View this record from Arxiv