All-optical spin switching probability in [Tb/Co] multilayers
Luis Avilés-Félix, Louis Farcis, Zebin Jin, Laura Álvaro-Gómez, Gunqiao Li, Kihiro T. Yamada, Andrei Kirilyuk, Aleksey V. Kimel, Theo Rasing, Bernard Dieny, Ric… 展开作者
Luis Avilés-Félix, Louis Farcis, Zebin Jin, Laura Álvaro-Gómez, Gunqiao Li, Kihiro T. Yamada, Andrei Kirilyuk, Aleksey V. Kimel, Theo Rasing, Bernard Dieny, Ricardo C. Sousa, Ioan-Lucian Prejbeanu, Liliana D. Buda-Prejbeanu
Since the first experimental observation of all-optical switching phenomena, intensive research has been focused on finding suitable magnetic systems that can be integrated as storage elements within spintronic devices and whose magnetization can be controlled through ultra-short single laser pulses. We report here atomistic spin simulations of all-optical switching in multilayered structures alternating n monolayers of Tb and m monolayers of Co. By using a two temperature model, we numerically calculate the thermal variation of the magnetization of each sublattice as well as the magnetization dynamics of [Tbn/Com] multilayers upon incidence of a single laser pulse. In particular, the condition to observe thermally-induced magnetization switching is investigated upon varying systematically both the composition of the sample (n,m) and the laser fluence. The samples with one monolayer of Tb as [Tb1/Co2] and [Tb1/Co3] are showing thermally induced magnetization switching above a fluence threshold. The reversal mechanism is mediated by the residual magnetization of the Tb lattice while the Co is fully demagnetized in agreement with the models developed for ferrimagnetic alloys. The switching is however not fully deterministic but the error rate can be tuned by the damping parameter. Increasing the number of monolayers the switching becomes completely stochastic. The intermixing at the Tb/Co interfaces appears to be a promising way to reduce the stochasticity. These results predict for the first time the possibility of TIMS in [Tb/Co] multilayers and suggest the occurrence of sub-picosecond magnetization reversal using single laser pulses.
Tip-Based Proximity Ferroelectric Switching and Piezoelectric Response in Wurtzite Multilayers
Frantsevich Institute for Problems in Materials Science, National Academy of Sciences of Ukraine（乌克兰国家科学院弗拉特谢维奇材料科学问题研究所）；Institute of Physics, National Academy of Sciences of Ukraine（乌克兰国家科学院物理研究所）；Department of Materials Science and Engineering, University of Tennessee（田纳西大学材料科学与工程系）；Department of Materials Science and Engineering, Pennsylvania State University（宾夕法尼亚州立大学材料科学与工程系）
