Article
Materials Science, Multidisciplinary
Sucheta Mondal, Debanjan Polley, Akshay Pattabi, Jyotirmoy Chatterjee, David Salomoni, Luis Aviles-Felix, Aurelien Olivier, Miguel Rubio-Roy, Bernard Dieny, Liliana Daniela Buda Prejbeanu, Ricardo Sousa, Ioan Lucian Prejbeanu, Jeffrey Bokor
Summary: Researchers have achieved single-shot switching of nanoscale magnetic tunnel junctions (MTJs) based on Tb/Co-multilayer by combining optical writing and electrical read-out methods. The potential of single-shot switching was demonstrated by varying the cell diameter. The findings have significant implications for the development of ultrafast spintronic devices.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Multidisciplinary Sciences
L. Aviles-Felix, L. Farcis, Z. Jin, L. Alvaro-Gomez, G. Li, K. T. Yamada, A. Kirilyuk, A. V. Kimel, Th. Rasing, B. Dieny, R. C. Sousa, I. L. Prejbeanu, L. D. Buda-Prejbeanu
Summary: This study uses atomistic spin simulations to investigate all-optical switching in multilayered structures. By calculating the thermal variation and magnetization dynamics, it explores the possibility of thermally-induced magnetization switching in Tb/Co multilayers under specific conditions.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Applied
Y. Peng, G. Malinowski, J. Gorchon, J. Hohlfeld, D. Salomoni, L. D. Buda-Prejbeanu, R. C. Sousa, I. L. Prejbeanu, D. Lacour, S. Mangin, M. Hehn
Summary: Single-shot all-optical helicity-independent switching is achieved in Co/Ho multilayers with varying thicknesses and repetition numbers. Despite larger spin-orbit coupling, which would increase dissipation of angular momentum to the lattice, the pulse duration versus fluence state diagram is similar to the Gd-based system.
PHYSICAL REVIEW APPLIED
(2023)
Article
Materials Science, Multidisciplinary
P. Syam Prasad, Jyoti Ranjan Mohanty
Summary: After the discovery of helicity-independent all-optical switching (HI-AOS) in amorphous GdFeCo, efforts have been made to understand the mechanism and explore its potential for data storage applications. HI-AOS has been observed in Gd-based ferrimagnetic alloys, and there is a need to broaden the range of materials that show this phenomenon.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Applied
Julian Hintermayr, Pingzhi Li, Roy Rosenkamp, Youri L. W. van Hees, Junta Igarashi, Stephane Mangin, Reinoud Lavrijsen, Gregory Malinowski, Bert Koopmans
Summary: In this study, we investigate single-shot all-optical switching (AOS) in Tb/Co/Gd/Co/Tb multilayers to establish AOS in synthetic ferrimagnets with high magnetic anisotropy. By varying the thicknesses of Tb, we find that the threshold fluence for switching is largely independent of the Tb content, indicating the dominant role of Co and Gd interactions. Furthermore, using time-resolved MOKE, we determine that the magnetization crosses zero within the first ps after laser excitation.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Maxime Verges, Sreekanth Perumbilavil, Julius Hohlfeld, Francisco Freire-Fernandez, Yann Le Guen, Nikolai Kuznetsov, Francois Montaigne, Gregory Malinowski, Daniel Lacour, Michel Hehn, Sebastiaan van Dijken, Stephane Mangin
Summary: The impact of plasmonic surface lattice resonances on the magneto-optical properties and energy absorption efficiency of [Co/Gd/Pt](N) multilayer nanodisks has been investigated. It is shown that surface lattice resonances enable all-optical single pulse switching of [Co/Gd/Pt](N) nanodisk arrays with 400% lower energy than continuous [Co/Gd/Pt](N) films. Additionally, the magneto-optical Faraday effect is enhanced by up to 5,000% at resonance condition. The study demonstrates the potential for designing magnetic metasurfaces for all-optical magnetization switching applications.
Article
Physics, Multidisciplinary
K. Mishra, T. G. H. Blank, C. S. Davies, L. Aviles-Felix, D. Salomoni, L. D. Buda-Prejbeanu, R. C. Sousa, I. L. Prejbeanu, B. Koopmans, Th. Rasing, A. V. Kimel, A. Kirilyuk
Summary: Recent works have demonstrated the all-optical switching of magnetization in Tb/Co multilayers using ultrashort laser pulses, while the same process is not achievable in TbCo alloys. In this study, we provide a plausible explanation for this difference based on the angular momenta treatment and gyromagnetic ratio of rare-earth-based ferrimagnets. Furthermore, we investigate the composition-dependent dynamic behavior of the switching process in Tb/Co multilayers through single-shot time-resolved pump-probe experiments, revealing it deviates from the accepted framework applicable to Gd-based systems and Mn-containing Heusler alloys.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Physics, Applied
Yunzhuo Wu, Xiaoxue Zeng, Yonghai Guo, Qi Jia, Bo Wang, Jiangwei Cao
Summary: The study investigated spin-orbit torque (SOT) effect and magnetization switching in Pt/Co-Tb/Ta structures with various Co-Tb compositions. Results revealed a certain law for current-induced SOT effective fields in the structure, as well as low coercivity near the compensation composition enabling current-induced magnetization switching at a low threshold current density. Direct Kerr imaging verified two different current-induced switching mechanisms in the Pt/Co-Tb/Ta system.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
A. Kudlis, I. Iorsh, I. A. Shelykh
Summary: Efficient control of magnetization without external magnetic fields is the ultimate goal of spintronics. In monolayers of CrI3, magnetization can be switched all optically through the resonant pulses of circularly polarized light, due to the efficient coupling of lattice magnetization with a bright excitonic transition. CrI3 is a promising functional material with high potential for applications in spintronics and ultrafast magnetic memory.
Article
Physics, Applied
Zhiming Dai, Wei Liu, Xiaotian Zhao, Long Liu, Yuhang Song, Zhidong Zhang
Summary: This study investigates the enhancement mechanism of spin-orbit torque (SOT) with interlayer exchange coupling, demonstrating the pivotal role of reducing domain wall energy in achieving field-free SOT switching. Comparing with direct ferromagnetic couplings, the interlayer exchange coupling system shows significant improvements in switching ratio and efficiency, with domain wall motion direction dominated by field modulation. This work could potentially pave the way for practical spin-orbit torque-based memory, oscillating, and logic devices.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Sergii Parchenko, Antoni Frej, Hiroki Ueda, Robert Carley, Laurent Mercadier, Natalia Gerasimova, Giuseppe Mercurio, Justine Schlappa, Alexander Yaroslavtsev, Naman Agarwal, Rafael Gort, Andreas Scherz, Anatoly Zvezdin, Andrzej Stupakiewicz, Urs Staub
Summary: This study investigates the changes in magnetization induced by resonant absorption of infrared photons in Co-doped yttrium iron garnet using ultrafast X-ray spectroscopy. The results show that optical excitation affects the two distinct magnetic Fe sublattices differently, resulting in a transient non-collinear magnetic state. This work demonstrates a fundamentally new scenario for controlling magnetization using optical methods.
Article
Physics, Applied
Jiaqi Wei, Boyu Zhang, Michel Hehn, Wei Zhang, Gregory Malinowski, Yong Xu, Weisheng Zhao, Stephane Mangin
Summary: Experimental results show that longer pulse duration leads to narrower fluence window for switching in Gd-Fe-Co thin films, indicating a linear increase in critical fluence for single-pulse switching with pulse duration. The study also demonstrates that best energy efficiency and longest pulse duration for switching are achieved around the magnetic compensation point.
PHYSICAL REVIEW APPLIED
(2021)
Article
Multidisciplinary Sciences
Dominik M. Irber, Francesco Poggiali, Fei Kong, Michael Kieschnick, Tobias Luehmann, Damian Kwiatkowski, Jan Meijer, Jiangfeng Du, Fazhan Shi, Friedemann Reinhard
Summary: The all-optical spin readout scheme demonstrated in this study achieves single-shot fidelity even with poor photon collection efficiency, which is crucial for sensing and scalable quantum registers based on shallow implanted NV centers.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Naotaka Yoshikawa, Kazuma Ogawa, Yoshua Hirai, Kohei Fujiwara, Junya Ikeda, Atsushi Tsukazaki, Ryo Shimano
Summary: Non-volatile chirality switching is achieved in a ferromagnetic Weyl semimetal via all-optical magnetization reversal, which allows for control of quantum properties in Weyl semimetals.
COMMUNICATIONS PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Guan-Qi Li, Xiang-Yu Zheng, Jun-Lin Wang, Xian-Yang Lu, Jing Wu, Jian-Wang Cai, Hao Meng, Bo Liu, Thomas A. Ostler, Yong-Bing Xu
Summary: The contribution of heating and helicity effects in helicity-dependent all-optical switching can be identified using a dual-pump laser excitation approach. The results reveal that the transient magnetization state upon which circularly polarized laser pulses impinge is the key factor for achieving all-optical switching.
Article
Materials Science, Multidisciplinary
A. Frej, C. S. Davies, A. Kirilyuk, A. Stupakiewicz
Summary: Recently, researchers have discovered that the excitation of optical phonon modes at resonance offers a promising energy-efficient pathway for ultrafast magnetization switching. In this study, the characteristics of different optical phonon modes in cobalt-doped yttrium iron garnet were explored using time-resolved pump-probe measurements. By rotating the linear polarization of both the pump and probe, a wide spectrum of optical phonons within the frequency band of 3-11 THz was identified. The lifetime of a phonon mode with an eigenfrequency of 3.4 THz was determined to be up to 13 ps, which makes it the most promising candidate for ultrafast phononic switching of magnetization in garnets.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Optics
Vladislav Bilyk, Kirill Grishunin, Paul Tinnemans, Theo Rasing, Andrey Kirilyuk, Olga Sergeeva, Natalia Sherstyuk, Elena Mishina, Sergey Lavrov, Alexander Sigov
Summary: This study demonstrates the effect of optical rectification (OR) in the terahertz range (THz rectification, TR). By applying pulsed radiation with specific frequencies and electric field strengths, a direct current voltage is generated on the surfaces of a ferroelectric triglycine sulfate (TGS) single crystal. The TR effect allows for the direct determination of the nonlinear susceptibilities of media, even under strong absorption conditions, without reference or optical channel calibration, and without the need for Fourier transform.
Article
Nanoscience & Nanotechnology
S. Adhikari, J. Li, Y. Wang, L. Ruijs, J. Liu, B. Koopmans, M. Orrit, R. Lavrijsen
Summary: The magnetization switching of synthetic antiferromagnetic nanoplatelets (SAF-PMA NPs) was studied using a single-particle optical technique. The results showed the spatial and temporal heterogeneity of magnetic switching fields at the single-particle level. This research provides important insights into the dynamic torque transfer in biomedical and microfluidic applications.
Article
Instruments & Instrumentation
A. Dolgikh, T. B. Shapaeva, K. T. Yamada, M. V. Logunov, T. H. Rasing, A. V. Kimel
Summary: In this study, we demonstrate time-resolved measurements of domain pattern movements with nanometer spatial and femtosecond temporal resolution using diffraction of femtosecond laser pulses of visible light. Our results show that visible light signals can detect a 6 nm domain wall displacement with high signal-to-noise ratio.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Nanoscience & Nanotechnology
D. Khusyainov, T. Gareev, V. Radovskaia, K. Sampathkumar, S. Acharya, M. Siskins, S. Manas-Valero, B. A. Ivanov, E. Coronado, Th. Rasing, A. V. Kimel, D. Afanasiev
Summary: Using a time-resolved magneto-optical pump-probe technique, the ultrafast laser-induced dynamics of mutually correlated spins and lattice in CoPS3 were experimentally studied. It was found that the femtosecond laser pulse acted as an ultrafast heater and melted the antiferromagnetic order. The resonant pumping of the T-4(1g) ? T-4(2g) electronic transition in Co2+ ions effectively changed their orbital momentum and generated a coherent B-g phonon mode.
Article
Physics, Multidisciplinary
K. Mishra, T. G. H. Blank, C. S. Davies, L. Aviles-Felix, D. Salomoni, L. D. Buda-Prejbeanu, R. C. Sousa, I. L. Prejbeanu, B. Koopmans, Th. Rasing, A. V. Kimel, A. Kirilyuk
Summary: Recent works have demonstrated the all-optical switching of magnetization in Tb/Co multilayers using ultrashort laser pulses, while the same process is not achievable in TbCo alloys. In this study, we provide a plausible explanation for this difference based on the angular momenta treatment and gyromagnetic ratio of rare-earth-based ferrimagnets. Furthermore, we investigate the composition-dependent dynamic behavior of the switching process in Tb/Co multilayers through single-shot time-resolved pump-probe experiments, revealing it deviates from the accepted framework applicable to Gd-based systems and Mn-containing Heusler alloys.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Mark C. H. de Jong, Bennert H. M. Smit, Marielle J. Meijer, Juriaan Lucassen, Henk J. M. Swagten, Bert Koopmans, Reinoud Lavrijsen
Summary: In this study, we demonstrate that the nucleation of magnetic skyrmions can be controlled by Ga+ ion irradiation, modulating the magnetic interface effects. We quantitatively investigate the impact of these changes on skyrmion nucleation and find that the energy cost can be reduced by up to 26% and scales linearly with the square root of domain wall energy density. Moreover, we observe that the number of nucleated skyrmions is linearly dependent on the ion dose and can be doubled compared to nonirradiated devices, indicating that ion irradiation enables fine control over the nucleation process.
Article
Physics, Condensed Matter
K. H. Prabhakara, T. B. Shapaeva, V. V. Yurlov, K. A. Zvezdin, A. K. Zvezdin, C. S. Davies, A. Tsukamoto, A. I. Kirilyuk, Th. Rasing, A. V. Kimel
Summary: Using double high-speed photography, it has been demonstrated that an external magnetic field can induce the movement of a GdFeCo domain wall at velocities of up to 1.2 km/s. The velocity of the domain wall increases and levels off as the amplitude of the driving magnetic field pulse increases. Unlike previous experiments on iron ferrites, no impact of femtosecond laser pulses on the dynamics of the domain wall has been observed, even when the pump pulse energy is sufficient for magnetic reversal.
PHYSICS OF THE SOLID STATE
(2023)
Article
Materials Science, Multidisciplinary
T. Janssen, M. Gidding, C. S. Davies, A. V. Kimel, A. Kirilyuk
Summary: Utilizing optically induced strain to spatially modify the magnetic order parameter of an antiferromagnet could have important applications in future antiferromagnet-based data-storage technologies.