论文标题
使用超快速激光器在NICO2O4薄膜中光学诱导的磁化切换
Optically-induced magnetization switching in NiCo2O4 thin films using ultrafast lasers
论文作者
论文摘要
最近，在实现下一代超快磁性信息设备方面，全光磁化控制引起了人们的关注。 Here, employing a magneto-optical Kerr effect (MOKE) microscope, we observed the laser-induced magnetization switching of ferrimagnetic oxide NiCo2O4 (NCO) epitaxial thin films with perpendicular magnetic anisotropy, where the sample was pumped at 1030-nm laser pulses, and magnetic domain images were acquired via the MOKE microscope with a white light emitting diode.激光脉冲在各种温度从300 K到400 K的各种温度下照射NCO薄膜，同时改变脉冲间隔，频率和脉冲数量的参数，并且没有外部磁场。我们观察到在380 K及以上的累积全光开关。我们对氧化物NCO薄膜的观察促进了使用超快激光器的化学稳定磁化切换的实现，而无需施加磁场。
Recently, all-optical magnetization control has been garnering considerable attention in realizing next-generation ultrafast magnetic information devices. Here, employing a magneto-optical Kerr effect (MOKE) microscope, we observed the laser-induced magnetization switching of ferrimagnetic oxide NiCo2O4 (NCO) epitaxial thin films with perpendicular magnetic anisotropy, where the sample was pumped at 1030-nm laser pulses, and magnetic domain images were acquired via the MOKE microscope with a white light emitting diode. Laser pulses irradiated an NCO thin film at various temperatures from 300 K to 400 K while altering the parameters of pulse interval, fluence, and the number of pulses with the absence of the external magnetic field. We observed accumulative all-optical switching at 380 K and above. Our observation of oxide NCO thin films facilitates the realization of chemically stable magnetization switching using ultrafast lasers, and without applying a magnetic field.
