Mechanism of drift of stripe magnetic domains in ferrite-garnet single crystals

Pamyatnykh, L. A.; Lysov, M. S.; Kandaurova, G. S.

doi:10.3103/s1062873807110032

Cited by 9 publications

(6 citation statements)

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“…Experimental study was performed on (111) iron H 0 = 100 Oe is due to rapid increase of the number of magnetic dislocations [1] that nucleate in the sample at elds H 0 > 100 Oe.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Study of Stripe Magnetic Domain Structure Drift in Iron Garnet Crystals

et al. 2015

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The results of experimental and theoretical study of magnetic domain structure drift in low frequency oscillating magnetic eld oriented perpendicular to the sample plate are presented. Experimental study was performed on uniaxial iron garnet (TbErGd)3(FeAl)5O12 (111) plate with rhombic anisotropy for the case when orientation of domain walls of stripe domains is preserved. Dynamic domain structure was revealed by means of magnetooptic Faraday e ect and registered by high speed digital camera at the speed equal to 1200 fps. Theoretical model based on the motion equations for coupled harmonic oscillators that takes into account attenuation and eld inhomogeneity along the plate is proposed.

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“…Experimental study was performed on (111) iron H 0 = 100 Oe is due to rapid increase of the number of magnetic dislocations [1] that nucleate in the sample at elds H 0 > 100 Oe.…”

Section: Resultsmentioning

confidence: 99%

Experimental and Theoretical Study of Stripe Magnetic Domain Structure Drift in Iron Garnet Crystals

et al. 2015

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“…In the range of comparatively low frequencies (25–1200 Hz) of an alternating magnetic field, we observe drift of DWs, i.e., the system of stripe domains moves as a whole in a direction perpendicular to the planes of DWs 9 , 10 . In this work we study not the drift of DWs itself but nucleation, motion and interaction of MDs.…”

Section: Resultsmentioning

confidence: 92%

“…A domain structure (DS) exerts a significant effect on many important characteristics of magnetically ordered materials 1 – 8 . As shown in 9 , 10 , a defect of the domain structure–magnetic dislocations (MDs)–defines the mechanism for the drift of domain walls (DWs) in an alternating magnetic field. In this work, we report a study of the dynamic behavior of magnetic dislocations themselves.…”

Section: Introductionmentioning

confidence: 99%

Motion and Interaction of Magnetic Dislocations in Alternating Magnetic Field

Pamyatnykh

Filippov

Agafonov

et al. 2017

Sci Rep

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The behavior of magnetic dislocations (MDs) in an alternating harmonic magnetic field in iron garnets has been experimentally investigated. The results are presented for single-crystal plates in which the drift of domain walls is observed in fields of sound frequencies. It is found that MDs in a stripe domain structure are able to move not only along but also across domain walls. A pairwise interaction between magnetic dislocations when they approach each other to distances on the order of the sizes of the cores of MDs is revealed. The processes of the annihilation, mutual passing of magnetic dislocations through each other and overtaking are found. The features of the dynamic behavior of MDs are explained using a mechanism based on the presence of vertical Bloch lines in a structure of domain walls. MDs are formed at nucleation centers, and their nucleation field is lower than the drift-starting field, which corresponds to previously proposed dislocational mechanism of the drift. The dependencies of quantitative parameters of the drift and MDs on amplitude and frequency of the pumping field are determined. The behavior of MDs should be considered when analyzing the mechanisms for magnetization and temperature-dependent phase transitions in magnetic layers.

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“…Direct observations of the reconstruction of the domain structure in a variable magnetic field along the hysteresis loop showed that the hysteresis was caused by two factors: (i) the delayed emergence and growth of the new magnetic phase in the variable magnetic field and (ii) the abrupt increase in the number of magnetic dislocations [2] upon increasing the ampli tude of the harmonic magnetic field.…”

Section: Drift Of Domain Boundariesmentioning

confidence: 99%

“…The results from simultaneously investigating the reconstruction of a domain structure (DS) and mag netooptical hysteresis loops in the region of frequen cies and amplitudes of a variable magnetic field in which the drift of domain walls was observed were pub lished in [1][2][3]. A harmonic magnetic field with a fre quency of 25-1000 Hz and amplitude H 0 of up to 750 Oe was applied perpendicular to wafer plane (111) of a single (TbErGd) 3 Fe 5 O 12 ferrite-garnet crystal 50 µm thick with quality factor Q < 1.…”

Section: Introductionmentioning

confidence: 99%

Drift of domain walls in a harmonic magnetic field

Pamyatnykh

Druzhinin

Lysov

et al. 2013

Bull. Russ. Acad. Sci. Phys.

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Abstract-It is shown that a two step form of the dynamic magnetization curve (and the hysteresis loop) established for a multiaxial ferrite-garnet wafer with a low quality factor (Q < 1) and considerable anisotropy in the plane (K p /K u = 14) in the frequency range of 25-1000 Hz is explained by the reconstruction of the dynamic domain structure, particularly by the established features of the drift of domain boundaries in the harmonic magnetic field.

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Mechanism of drift of stripe magnetic domains in ferrite-garnet single crystals

Cited by 9 publications

References 0 publications

Experimental and Theoretical Study of Stripe Magnetic Domain Structure Drift in Iron Garnet Crystals

Experimental and Theoretical Study of Stripe Magnetic Domain Structure Drift in Iron Garnet Crystals

Motion and Interaction of Magnetic Dislocations in Alternating Magnetic Field

Drift of domain walls in a harmonic magnetic field

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