Auswahl der wissenschaftlichen Literatur zum Thema „All-optical helicity-independent switching“
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Zeitschriftenartikel zum Thema "All-optical helicity-independent switching"
Gao, Shihan, Runji Cai, Wanjie Xiong und Chudong Xu. „Influence of a damping parameter on helicity-independent all-optical switching“. Optics Express 29, Nr. 20 (24.09.2021): 32535. http://dx.doi.org/10.1364/oe.435160.
Der volle Inhalt der QuelleLiu, Donglin, Jiawen Weng, Xinyu Song, Wenxi Cai, Suiyan Tan und Chudong Xu. „Ultrafast write-read event in helicity-independent all-optical switching of GdFeCo“. Journal of Magnetism and Magnetic Materials 592 (Februar 2024): 171824. http://dx.doi.org/10.1016/j.jmmm.2024.171824.
Der volle Inhalt der QuelleFan, Xiaofei, und Xiaoyang Lin. „Thermal impact on ultrafast helicity independent all-optical switching of GdxCo100-x“. Journal of Physics: Conference Series 2230, Nr. 1 (01.03.2022): 012025. http://dx.doi.org/10.1088/1742-6596/2230/1/012025.
Der volle Inhalt der QuelleZimnyakova, Polina E., Daria O. Ignatyeva, Andrey N. Kalish, Xiufeng Han und Vladimir I. Belotelov. „Plasmonic dichroism and all-optical magnetization switching in nanophotonic structures with GdFeCo“. Optics Letters 47, Nr. 23 (15.11.2022): 6049. http://dx.doi.org/10.1364/ol.472046.
Der volle Inhalt der QuelleHuang, Haozhe, Haiwei Wang, Zhihao Zeng, Rongyao Wang, Xinyu Zhang, Weiming Cheng und Changsheng Xie. „Investigation on the Effect of Femtosecond Laser Induced Spin Transfer Torque of GdFeCo Alloy“. Applied Sciences 11, Nr. 14 (15.07.2021): 6501. http://dx.doi.org/10.3390/app11146501.
Der volle Inhalt der QuelleDavies, C. S., J. H. Mentink, A. V. Kimel, Th Rasing und A. Kirilyuk. „Helicity-independent all-optical switching of magnetization in ferrimagnetic alloys“. Journal of Magnetism and Magnetic Materials, August 2022, 169851. http://dx.doi.org/10.1016/j.jmmm.2022.169851.
Der volle Inhalt der QuellePeng, Y., G. Malinowski, J. Gorchon, J. Hohlfeld, D. Salomoni, L. D. Buda-Prejbeanu, R. C. Sousa et al. „Single-Shot Helicity-Independent All-Optical Switching in Co/Ho Multilayers“. Physical Review Applied 20, Nr. 1 (31.07.2023). http://dx.doi.org/10.1103/physrevapplied.20.014068.
Der volle Inhalt der QuelleWei, Jiaqi, Boyu Zhang, Michel Hehn, Wei Zhang, Gregory Malinowski, Yong Xu, Weisheng Zhao und Stéphane Mangin. „All-optical Helicity-Independent Switching State Diagram in Gd - Fe - Co Alloys“. Physical Review Applied 15, Nr. 5 (28.05.2021). http://dx.doi.org/10.1103/physrevapplied.15.054065.
Der volle Inhalt der QuelleGweha Nyoma, Danny Petty, Maxime Vergès, Michel Hehn, Daniel Lacour, Julius Hohlfeld, Sebastiaan van Dijken, Grégory Malinowski, Stéphane Mangin und François Montaigne. „Size effect on single pulse all-optical helicity-independent switching in GdFeCo disk arrays“. Applied Physics Letters 123, Nr. 5 (31.07.2023). http://dx.doi.org/10.1063/5.0150250.
Der volle Inhalt der QuelleSait, Connor R. J., Maciej Dąbrowski, Jade N. Scott, William R. Hendren, David G. Newman, Alpha T. N'Diaye, Christoph Klewe et al. „Unidirectional multipulse helicity-independent all-optical switching in [Ni/Pt] based synthetic ferrimagnets“. Physical Review B 109, Nr. 13 (11.04.2024). http://dx.doi.org/10.1103/physrevb.109.134417.
Der volle Inhalt der QuelleDissertationen zum Thema "All-optical helicity-independent switching"
Gweha, Nyoma Danny Petty. „Size effects on all-optical helicity-independent switching in magnetic materials“. Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0035.
Der volle Inhalt der QuelleIn the last fifteen years single pulse all-optical switching has mainly been observed and studied in Transition Metal- Gd based thin film with high potential for enabling new application for energy efficient and fast magnetic data storage, memory, and logic. To move closer to nano or micro technologies, other materials with no or less rare-earth need to be engineered and lateral sample size must be reduced. In this work, we experimentally demonstrate single pulse toggle switching of the magnetization of GdFeCo disks with perpendicular to film plane anisotropy which diameter ranges from 3 µm to 400 nm using 35 fs linearly polarized laser pulses. Two different magnetic states are observed depending on the laser fluence: either deterministic switching of the disks magnetization or randomly oriented disk. We report that the fluence required to observe both magnetic states show a non-monotonic behavior with disk diameter, and that the smallest disks require the lowest minimum fluence for achieving single pulse all-optical helicity-independent switching. Different evolution of the fluence thresholds for both phenomenon as a function of the disk size is observed and discussed. Then, we demonstrate that starting with a Co/Pt bilayer showing strong perpendicular anisotropy, Gd dusting at the interface is sufficient to induce well define single pulse all optical switching. A careful analysis of the impact of the Gd/Co interface and the CoGd alloy composition on all optical switching is presented. The demonstration that very little amount of Gd is needed to induce the magnetization reversal of a ferromagnetic layer not only open new possibility for application, but it also questions theoretical description of the toggle switching mechanism. Finally, we present a systematic study of the magnetization reversal for Gd-dusted Pt/Co/Pt ferromagnet disks which diameter ranges from 1.5 µm to 400 nm with 35 fs linear polarization laser pulses. By varying the number of pulses, it appears that a single toggle switching probability can describe the behavior. The variation of this switching probability is precisely measured in a range from 90% to 99.99%. The switching probability degrades as the diameter of the disks is reduced. The "exponential" variation of the switching probability with the disk diameter size cannot be explained by specific thermal effects. On the other hand, a highly non uniform switching process with a weak microscopic switching probability explains our experimental data. A simple probabilistic model, analog to Condorcet's jury theorem is proposed and compared to micromagnetic simulations
Wei, Jiaqi. „Magnetization manipulation induced by spin current and ultrafast laser“. Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0121.
Der volle Inhalt der QuelleMagnetization manipulation is one of the most actively researched topics in the field of spintronics. Different ways of manipulation can trigger magnetization dynamics on different time scales. Among these dynamics, magnetization precession and ultrafast demagnetization have attracted substantial interests. The frequency of magnetization precession is normally in the GHz range corresponding to a period of hundreds of ps, which is the basic mechanism of spin torque nano-oscillators (STNO), a new type of microwave devices which show advantages over conventional voltage-controlled oscillator (VCO) in terms of size, energy consumption and tunable frequency. Ultrafast demagnetization was first observed in Ni which takes places in hundreds of femtoseconds. Triggered by this, All-Optical Switching (AOS) was then demonstrated which is much faster than any torque induced switching, promising for application in the high-speed magnetic memory. Although many studies on these two phenomena have been reported, several issues need to be addressed before they move toward application. STNOs are supposed to be used for amplitude shift keying (ASK) or frequency shift keying (FSK), but the optimal conditions for these two types of microwave modulation are still not well explored. As for AOS, the influence of the laser parameters such as fluence and pulse duration and the material properties such as the composition and the thickness has not been systematically investigated. In this thesis, these two types of magnetization manipulation are studied in detail. Concerning magnetization precession, we demonstrate that a stronger magnetic field allows a wider frequency tuning range while a smaller magnetic field results in a wider amplitude tuning range. Thus, these two scenarios are applicable to FSK and ASK, respectively, providing guidelines for STNO in microwave modulation. In the second study, we demonstrate that AOS depends strongly on pulse characteristic. This was shown by building a magnetization state diagram for GdFeCo and Co/Pt which are two typical materials showing All-Optical Helicity-Independent Switching (AO-HIS) and All-Optical Helicity-Dependent Switching (AO-HDS), respectively. These results allow a better understanding of the fundamental mechanism behind laser-induced magnetization dynamics