Laser-induced spin dynamics in the iron-yttrium garnet film doped with Si ions
https://doi.org/10.32362/2500-316X-2020-8-1-58-66
Abstract
A continuous increase in the volume of stored and processed data leads to stricter requirements for storage media. The most common information storage technology is currently based on magnetic materials, where information in the form of "0" and "1" is associated with the local direction of magnetization, determined by the external magnetic field created by the recording device. It is known that this approach has fundamental limitations on the recording speed which is almost achieved. The requirements for energy efficiency of storage media are also being made stricter. These circumstances lead to the development of alternative approaches to recording information. One of these approaches has been demonstrated in the field of ultrafast opto-magnetism, which has been booming over the past 20 years. It consists in recording information with short optical pulses without the application of an external magnetic field. However, it requires fundamental studies of physical processes, as well as materials, in which magnetization can be controlled by short optical pulses. In this paper, we consider the spin dynamics in a magnetic dielectric: a film of iron - yttrium garnet doped with silicon. The studies were carried out using the pump – probe technique over a time range of up to 800 ns. The spot size was 30 μm, the optical pulse duration was 35 fs, and the pump fluence was about 50 mJ/cm2. It is shown that a change in the magnetocrystalline anisotropy constants due to the action of a pump pulse on the structure causes a long-decaying magnetization precession with a period of about 200 ps. The dependences of the amplitude, phase, and decay of the precession on the magnitude of the external magnetic field in the range up to 1.84 kOe were obtained and analyzed. The studied processes can be considered on the basis of the Landau-Lifshitz-Gilbert model, and be of interest for the optical switching of magnetization, as well as the creation of various spintronic devices. It is shown that films of iron-yttrium garnet doped with silicon are a promising material for magnetic information carriers based on ultrafast opto-magnetism.
About the Authors
S. V. Ovcharenko
MIREA – Russian Technological University
Russian Federation
Russian Federation
Sergey V. Ovcharenko – Postgraduate Student of the Department of Nanoelectronics, Institute of Physics and Technology
78, Vernadskogo pr., Moscow 119454
M. S. Gaponov
MIREA – Russian Technological University
Russian Federation
Russian Federation
Mikhail S. Gaponov – Postgraduate Student of the Department of Nanoelectronics, Institute of Physics and Technology
78, Vernadskogo pr., Moscow 119454
N. A. Ilyin
MIREA – Russian Technological University
Russian Federation
Russian Federation
Nikita A. Ilyin – Сand. Sci. (Physics and Mathematics), Associate Professor of the Department of Physics, Institute of Physics and Technology. Author ID: 18037137700
78, Vernadskogo pr., Moscow 119454
M. V. Logunov
Kotelnikov Institute of Radioengineering & Electronics of Russian Academy of Sciences
Russian Federation
Russian Federation
Mikhail V. Logunov – Dr. Sci. (Physics and Mathematics), Professor, Leading Researcher. ResearcherID: J-9486-2013
125009, Moscow, 11 Mokhovaya St., building 7
Anhua Wu
Institute of Ceramics, Shanghai, Chinese Academy of Sciences
China
China
Anhua Wu – Professor, Center for Crystal Research
200050, Shanghai, 1295 Dingxi Rd
E. D. Mishina
MIREA – Russian Technological University
Russian Federation
Russian Federation
Elena D. Mishina – Dr. Sci. (Physics and Mathematics), Professor of the Department of Nanoelectronics, Institute of Physics and Technology. ResearcherID: D-6402-2014, Scopus Author ID: 7005350309
78, Vernadskogo pr., Moscow 119454
References
1. Kustov M., Grechishkin R., Gusev M., Gasanov O., McCord J. A Novel Scheme of Thermographic Microimaging Using Pyro-Magneto-Optical Indicator Films. Adv Mater. 2015;27(34):5017–22. https://doi.org/10.1002/adma.201501859
2. Goto T., Morimoto R., Pritchard J.W., Mina M., Takagi H., Nakamura Y., Lim P.B., Taira T., Inoue M. Magneto-optical Q-switching using magnetic garnet film with micro magnetic domains. Opt. Express. 2016;24(16):17635-17643. https://doi.org/10.1364/OE.24.017635
3. Huang B., Clark, G., Navarro-Moratalla E., Klein D., Cheng R., Seyler K.L., Zhong D., Schmidgall E. Layerdependent ferromagnetism in a van der Waals crystal down to the monolayer limit. Nature. 2017;546(7657):270-273. https://doi.org/10.1038/nature22391
4. Liu M., Zhang X. Plasmon-boosted magneto-optics. Nat. Photonics. 2013;7(6):429-430. https://doi.org/10.1038/nphoton.2013.134
5. Baranov P.G., Kalashnikova A.M., Kozub V.I., Korenev V.L., Kusrayev Y.G., Pisarev R.V. et al. Spintronics of semiconductor, metallic, dielectric, and hybrid structures (100th anniversary of the Ioffe Institute). Uspekhi fizicheskikh nauk = Physics-Uspekhi. 2018;189(08):849–880 (in Russ.). https://doi.org/10.3367/UFNe.2018.11.038486
6. Beaurepaire E., Merle J.C., Daunois A., Bigot J.Y. Ultrafast spin dynamics in ferromagnetic nickel. Phys. Rev. Lett. 1996;76(22):4250-4253. https://doi.org/10.1103/PhysRevLett.76.4250
7. Kimel A.V., Li M. Writing magnetic memory with ultrashort light pulses. Nat. Rev. Mater. 2019;4(3):189-200. https://doi.org/10.1038/s41578-019-0086-3
8. Hansteen F., Kimel A., Kirilyuk A., Rasing T. Femtosecond photomagnetic switching of spins in ferrimagnetic garnet films. Phys. Rev. Lett. 2005;95(4):1-4. https://doi.org/10.1103/PhysRevLett.95.047402
9. Hansteen F., Kimel A., Kirilyuk A., Rasing T. Nonthermal ultrafast optical control of the magnetization in garnet films. Phys. Rev. B. 2006;73(1):014421. https://doi.org/10.1103/PhysRevB.73.014421
10. Stupakiewicz A., Szerenos K., Afanasiev D., Kirilyuk A., Kimel A.V. Ultrafast nonthermal photo-magnetic recording in a transparent medium. Nature [Internet]. 2017;542(7639):71-74. https://doi.org/10.1038/nature20807
11. Stupakiewicz A., Szerenos K., Davydova M.D., Zvezdin K.A., Zvezdin A.K., Kirilyuk A. Selection rules for alloptical magnetic recording in iron garnet. Nat. Commun. 2019;10(1):612. https://doi.org/10.1038/s41467-019-08458-w
12. Kovalenko V., Kolezhuk E., Kuts P. Photomagnetic recording of information. Pis՚ma v ZhTF – Technical Physics Letters. 1981;7(16):1012–1016 (in Russ.).
13. Atoneche F., Kalashnikova A.M., Kimel A.V., Stupakiewicz A., Maziewski A., Kirilyuk A. Large ultrafast photoinduced magnetic anisotropy in a cobalt-substituted yttrium iron garnet. Phys. Rev. B. 2010;81(21):214440. https://doi.org/10.1103/PhysRevB.81.214440
14. Koopmans B., Malinowski G., Dalla Longa F., Steiauf D., Fähnle M., Roth T., et al. Explaining the paradoxical diversity of ultrafast laser-induced demagnetization. Nat. Mater. 2010;9(3):259–65. https://doi.org/10.1038/nmat2593
15. van Kampen M., Jozsa C., Kohlhepp J.T., LeClair P., Lagae L., de Jonge W.J.M. All-Optical Probe of Coherent Spin Waves. Phys. Rev. Lett. 2002;88(22):227201. https://doi.org/10.1103/PhysRevLett.88.227201
16. Kimel A.V., Bentivegna F., Gridnev V.N., Pavlov V.V., Pisarev R.V., Rasing T. Room-temperature ultrafast carrier and spin dynamics in GaAs probed by the photoinduced magneto-optical Kerr effect. Phys. Rev. B. 2001;63(23):235201. https://doi.org/10.1103/PhysRevB.63.235201
Review
For citations:
Ovcharenko S.V., Gaponov M.S., Ilyin N.A., Logunov M.V., Wu A., Mishina E.D. Laser-induced spin dynamics in the iron-yttrium garnet film doped with Si ions. Russian Technological Journal. 2020;8(1):58-66. (In Russ.) https://doi.org/10.32362/2500-316X-2020-8-1-58-66
Views:
1544
Email this article 