Excitation of magnetic precession in bismuth iron garnet via a polarization-independent impulsive photomagnetic effect
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Femtosecond photomagnetic switching of spins in ferrimagnetic garnet films.
We demonstrate that intense laser pulses can be used to directly control the spins in ferrimagnetic garnet films. Through an ultrafast and nonthermal photomagnetic effect the magnetocrystalline anisotropy is modified to create a new long-lived equilibrium orientation for the magnetization. Simultaneously, the magnetization is rotated into this new state by precession in a strong transient optic...
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We report on magnetization dynamics triggered in a Co/garnet heterostructure by femtosecond laser pulses. Although laser excitation of a bare Co-doped yttrium iron garnet leads to magnetization precession, the phase of which strongly depends on the linear polarization of the light pulses, the deposition of an ultrathin Co layer on a top of a garnet film results in substantial changes of the las...
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Photomagnetic storage and retrieval of information in the megahertz frequency range utilizes a ferrimagnetic material as the storage medium in conjunction with parametric excitation of infrared exchange resonance spinwave modes, by means of signal-modulated polarized coherent radiation, for example, from a COz laser at 10.6 micrometer length, focused to the storage medium. Parametric excitation...
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Faraday rotators that employ the magneto-optic effect are ubiquitous across several optical device categories: including optical isolators, polarization controllers, and spatial light modulators. However, Faraday rotators are notoriously difficult to fabricate at small scales due to the high magnetic field strengths required to generate significant light polarization vector rotations. In this p...
متن کاملTitle : Development of Magnetic Field Sensors Using Bismuth – Substituted Garnets Thin Films with In - Plane Magnetization
Dissertation Title : Development of Magnetic Field Sensors Using Bismuth – Substituted Garnets Thin Films with In-Plane Magnetization Iulian Nistor, Ph.D., 2006 Dissertation Directed By: Professor of Engineering Isaak D. Mayergoyz, Electrical and Computer Engineering Department, and Dr. Charles Krafft, Laboratory for Physical Sciences In the dissertation, the use of magnetic single crystal Bism...
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تاریخ انتشار 2017