Classical dependence of the domain wall velocity on the magnetic field in garnet ferrite films with orthorhombic magnetic anisotropy

Randoshkin, V. V.; Sazhin, Yu. N.

doi:10.1134/1.1477489

Phys. Solid State

2002

DOI: 10.1134/1.1477489

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Classical dependence of the domain wall velocity on the magnetic field in garnet ferrite films with orthorhombic magnetic anisotropy

V. V. Randoshkin

Yu. N. Sazhin

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2011

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“…The time it takes to reach this value is determined by the domain wall velocity, which has been well described for bismuth iron garnet. 11,12 By initially overshooting the field necessary to achieve 90 rotation, the domain wall velocity can initially be higher, resulting in faster switching.…”

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Magnetic pulse generation for high-speed magneto-optic switching

Kemmet

Mina

Weber

2011

Journal of Applied Physics

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In this article, the magnetic pulse characteristics needed to achieve high-speed magneto-optic (MO) switching are investigated. A fiber-based, MO, low-voltage optical switch capable of 200 ns switching is presented, along with the special circuit characteristics for magnetic field generation for high-speed switching. The switch consists of the optical system, the MO material (bismuth substituted iron garnet [(Bi1.1Tb1.9)(Fe4.25Ga0.75)O12]), and a high-speed magnetic field driving circuit. A Faraday rotator is placed within the interferometric loop of a fiber-optic Sagnac interferometer, and interference at the output ports is controlled by the applied field. The fast switching speed is accomplished via the special design of the magnetic pulse generation circuitry. The applied magnetic field overshoots the field necessary to achieve the desired Faraday rotation and then settles to a steady state field. If the duration of the overshoot is less than the time it takes the material to saturate, a fast optical switching time can be achieved without saturating the material. The effects of the overshoot amplitude and duration and steady-state amplitude on optical rise time (determined by domain wall velocity) are studied and experimental results are presented.

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confidence: 99%

Magnetic pulse generation for high-speed magneto-optic switching

Kemmet

Mina

Weber

2011

Journal of Applied Physics

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Classical dependence of the domain wall velocity on the magnetic field in garnet ferrite films with orthorhombic magnetic anisotropy

Cited by 1 publication

References 1 publication

Magnetic pulse generation for high-speed magneto-optic switching

Magnetic pulse generation for high-speed magneto-optic switching

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