[11p-N307-1~4] 4.7 Quantum Optics and Nonlinear Optics

▲ [11p-N307-2] Probe and control of low-power photo-excited magnetization precession in Co/Pd multilayer films

〇(D)Nicholas William Smith¹, Brenden A. Magill¹, Rathsara R. H. Mudiyanselage¹, Hiro Munekata², Giti A. Khodaparast¹ (1.Virginia Tech, 2.Tokyo Tech)

Keywords:Magnetic Films, Co/Pd Multilayers, Perpendicular Magnetic Anisotropy

Co/Pd thin film multilayers show large Perpendicular Magnetic Anisotropy (PMA) which is useful in MRAM devices for perpendicular magnetic recording. Co/Pd systems have been studied extensively through the use of ultrafast optical pump-probe methods in order to measure the Time Resolved Photo-excited Precession of Magnetization (TRPEPM). Most studies have been conducted at high laser fluence (> 1 mJ/cm2), where heating near the curie temperature occurs. In this study, we present low fluence measurements between 0.42 to 3.14 µJ/cm2 in Co/Pd systems with differing Co thickness between 0.4 to 0.74 nm to probe the role of interface anisotropy in low-power excitation.