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Your search keyword '"Shapaeva, T. B."' showing total 22 results
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22 results on '"Shapaeva, T. B."'

1. Optical excitation and probing of the antiferromagnetic modes with non-uniform in-depth distribution in birefringent antiferromagnetic crystals

Author

Voronov, A. A., Ignatyeva, D. O., Zvezdin, A. K., Shapaeva, T. B., and Belotelov, V. I.

Subjects
Physics - Optics, Physics - Applied Physics
Abstract

Optical pump-probe setups are commonly used for excitation and investigation of the spin dynamics in various types of magnetic materials. However, usually the spatially homogeneous excitation is considered. In the present study we describe an approach for optical excitation of the nonuniform THz spin dynamics and for probing its spatial distribution inside a magnetic crystal. We propose to illuminate a crystal with laser pulses of properly adjusted polarization to benefit from a strong optical birefringence inherent to the crystal. It results in an unusual behavior of the effective magnetic field generated by the pulses due to the inverse Faraday effect and the peculiar sign-changing dependence of the direct Faraday effect inside the crystal. The study is performed exemplary for yttrium orthoferrite crystal although the proposed approach is applicable for various magnetic materials with optical anisotropy.

Published
2021

7. Study of Domain Wall Dynamics in GdFeCo Using Double High-Speed Photography

Author

null Kimel A. V., null Rasing Th., null Kirilyuk A. I., null Tsukamoto A., null Davies C. S., null Zvezdin A. K., null Zvezdin K. A., null Yurlov V. V., null Shapaeva T. B., and null Prabhakara K. H.

Subjects
FELIX Condensed Matter Physics, Ultrafast Spectroscopy of Correlated Materials, Spectroscopy of Solids and Interfaces, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
Abstract

Using the technique of double high-speed photography method, we show that an external magnetic field triggers in GdFeCo domain wall motion with velocities up to 1.2 km/s. The domain wall velocity saturates with an increase of the driving magnetic field. Contrary to earlier experiments on iron garnets, we did not succeed to detect any effect of femtosecond laser pulses on the domain wall velocity, even if the pulses were strong enough to reverse magnetization. Keywords: ferrimagnetism, domain wall dynamics, high-speed photography method, Faraday effect.

Published
2023

10. Study of Domain Wall Dynamics in GdFeCo Using Double High-Speed Photography

Author

Prabhakara, K. H., Shapaeva, T. B., Yurlov, V. V., Zvezdin, K. A., Zvezdin, A. K., Davies, C. S., Tsukamoto, A., Kirilyuk, A. I., Rasing, Th., and Kimel, A. V.

Abstract

Abstract: It is shown using the technique of double high-speed photography that an external magnetic field triggers the motion of a GdFeCo domain wall with a velocity up to 1.2 km/s. The domain wall velocity increases and levels off with an increase in the amplitude of the driving magnetic-field pulse. In contrast to the earlier experiments on iron ferrites, no influence of femtosecond laser pulses on the domain wall dynamics has been observed, even when the pump pulse energy is sufficient for magnetization reversal.

Published
2023
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