Magnetization Dynamics of Iron Garnet Crystals in Oscillating Magnetic Field

Lysov

Physics of the Solid State

et al. 2022

Conditions for the drift of domain walls in pulsed magnetic fields of various organization (bipolar and unipolar pulsed magnetic fields, pulse packets) are established. Dependences of domain walls drift velocity on the parameters of pulsed magnetic fields (frequency, amplitude, pulse duration) are obtained. As a result of numerical simulation of domain walls drift in a uniaxial sample, an experimentally confirmed mechanism of domain walls drift in pulsed magnetic fields is proposed. Keywords: pulsed magnetic fields, iron garnets, domain walls, dynamic domain structures, drift of domain walls.

Section: Dependence Of Domain Walls Drift Velocity On Parameters Of B...mentioning

confidence: 57%

Section: Numerical Simulation Of Dw Motion In Pulsed Magnetic Fieldmentioning

confidence: 99%

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Mechanism of domain walls drift in pulsed magnetic fields in iron garnet crystals

Lysov

Physics of the Solid State

et al. 2022

“…Численное моделирование движения ДГ в одноосном кристалле проведено в рамках модели вынужденных колебаний системы связанных гармонических осцилляторов [19][20][21][22] A и B (см. рис.…”

Section: численное моделирование движения дг в гармоническом полеunclassified

“…В настоящей работе в отличие от работ [20][21][22] предполагается, что в образце, находящемся в пространственно однородном магнитном поле, направленном перпендикулярно плоскости образца, имеется анизотропия параметра затухания: величина параметра затухания различна при движении ДГ в разных направлениях вдоль оси OX, перпендикулярной плоскости доменных границ. Сделать такое предположение позволяет наблюдаемая экспериментально разность смещений ДГ при приложении перпендикулярно плоскости образца импульсов поля различной полярности (см.…”

Section: численное моделирование движения дг в гармоническом полеunclassified

Асимметричность Колебаний Доменных Границ В Гармоническом И Импульсном Магнитных Полях В Кристаллах Ферритов-Гранатов С Дрейфом Полосовой Доменной Структуры

Памятных¹,

Мехоношин²,

Памятных³

et al. 2019

Физика Твердого Тела

An asymmetric displacement of domain walls during their oscillatory motion and an asynchronous change in the velocities of neighboring domain walls have been revealed in iron garnet crystals with different characters of magnetic anisotropy in an alternating harmonic magnetic field at field amplitudes lower than the field initiating the drift motion of the domain structure. It has been established that in a bipolar pulsed magnetic field the displacement of domain walls in the direction of drift exceeds the displacement of domain walls in the direction opposite to drift. A theoretical model in which asymmetry in the oscillations of domain walls and drift appear due to anisotropy in the attenuation parameter is proposed.

Unidirectional motion of magnetic domain walls: the experiment and numerical simulation

Pamyatnykh¹,

Lysov²,

Pamyatnykh³

et al. 2019

J. Phys.: Conf. Ser.

The results of study of unidirectional motion of topologically different domain structures under the influence of periodic bipolar and unipolar magnetic field pulses applied perpendicular to the sample plane of (111) iron garnet single crystal plate are presented. The response of the domain structure to the field pulses was studied by direct observations utilizing the stroboscopic technique. Experimentally obtained dependences of the speed of unidirectional motion of stripe domains on the parameters of external bipolar pulsed magnetic field are compared with the results of numerical simulations.