Electron microscopy of the magnetic structure of thin films

Petrov, V.I.; Spivak, G.V.; Pavlyuchenko, O.P.

doi:10.3367/ufnr.0106.197202b.0229

Cited by 9 publications

(4 citation statements)

References 42 publications

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“…2 shows the variations in a micromagnetic structure during magnetization reversal of a thin nanocrystalline film with D = 12 nm. These pictures are very like the images of a magnetization ripple obtained on real films [9,10]. With the external field decreasing, starting from about 10 kOe, a fine magnetic structure -the magnetization ripple -is formed in the sample.…”

Section: Modeling Detailsmentioning

confidence: 75%

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Numerical Simulation of Magnetic Microstructure in Nanocrystalline Thin Films with the Random Anisotropy

Belyaev¹,

Izotov²,

Solovev³

2017

J. Sib. Fed. Univ., Math. phys.

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The magnetic structure of thin nanocrystalline films with a random distribution of magnetization easy axes was studied by means of micromagnetic modeling. The dependences of the correlation function parameters of the non-uniform magnetization on the value of the external in-plane magnetic field were investigated in the wide range (6-1000 nm) of particles sizes. An analysis of the obtained dependences revealed a significant difference between longitudinal (along the field) and transversal (perpendicular to the field) correlation radii of a stochastic magnetic structure. The blocking effect of a fine magnetic structure-a magnetization ripple-was observed during magnetization reversal of the films.

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Section: Modeling Detailsmentioning

confidence: 75%

“…Here, a domain structure is forming, which stray fields block the magnetic structure, as shown in Ref. [8,9]. For H ≈ −1.6 Oe, a pronounced stripe domain structure is formed, with the magnetization ripple within each domain.…”

Section: Modeling Detailsmentioning

confidence: 99%

Numerical Simulation of Magnetic Microstructure in Nanocrystalline Thin Films with the Random Anisotropy

Belyaev¹,

Izotov²,

Solovev³

2017

J. Sib. Fed. Univ., Math. phys.

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“…It has been shown [4] that the behavior of the FeBO 3 :Mg MMS on varying external conditions can be well described by the well-known "magnetic ripple" theory [6], according to which the period of magnetic order modulation (in view of the hexagonal symmetry of the crystal in the (111) plane) is described as Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

Photoinduced changes in the space-modulated magnetic order of a FeBO3:Mg single crystal

2011

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An effect of nonpolarized white light on the modulated magnetic structure of a FeBO 3 :Mg single crystal, which arises in this light-plane weak ferromagnet in the low temperature range during technical magnetization, has been revealed. It has been found that the degree of the light action on the magnetic state of FeBO 3 :Mg depends both on its duration and on the orientation of the spontaneous magnetization vector M of the crystal during illumination. Interpretation of the results obtained has been performed in the context of the "magnetic ripple" theory on the assumption that the absorbed light induces additional uniaxial magnetic anisotropy in the easy plane of the crystal and that the anisotropy axis is collinear to the vector M during illumination.

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“…One of the first papers to study magnetization dynamics using a pulsed electron beam was published by the group of Oleg Bostanjoglo [43]. They utilized an electric beam blanker to generate 50 ns long pulses and stroboscopically acquired Lorentz micrographs of magnetic domains excited via an ultrasonic transducer with 10-50 kHz sine waves [103]. Later the group improved the time resolution of their setup to around 1 ns, which allowed them to study the displacement of domain walls due to an alternating magnetic field with frequencies of up to 30 MHz [81].…”

Section: Time-resolved Lorentz Microscopymentioning

confidence: 99%

Imaging vortex pinning and gyration by time-resolved and in-situ Lorentz microscopy

Möller¹

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I am grateful to everyone who has helped me throughout my PhD journey. Without their support, encouragement, and guidance, this thesis would not have been possible.First and foremost, I would like to express my sincere gratitude to my supervisor Prof. Dr. Claus Ropers, for his enduring mentorship, insightful feedback, and patient guidance. I have learned so much from him and am grateful for the opportunity to work under his supervision.I am also grateful to the members of my thesis committee, Prof. Dr. Stefan Mathias, and Dr. Henning Ulrichs, for their constructive feedback and suggestions. Their insights have helped me to improve the quality of this thesis.Special thanks go to my colleague John Henri Gaida. His contribution was invaluable and his expertise and insights were instrumental in the successful completion of my research projects.I would like to extend my appreciation to my other colleagues Thomas Danz, Armin Feist, Till Domröse, Nora Bach and Karin Ahlborn, for their friendship and support throughout my PhD journey. Their encouragement and advice have been invaluable.Many thanks to my colleague Benjamin Schröder, who generously volunteered his time and expertise to proofread this thesis. His suggestions and attention to detail greatly improved the quality of this work.To my beloved wife Simone and our wonderful son Jona, I am eternally grateful for their unflagging love and support. Their presence in my life has been a constant source of joy and motivation. I am deeply thankful to my late father Werner and my mother Renate for their unwavering support. My father's passing during my PhD was a difficult time for me, but his memory and the values he instilled in me have continued to inspire and motivate me.

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Electron microscopy of the magnetic structure of thin films

Abstract: Рис. 6. К расчету контраста в дефокуси-рованном режиме.

Cited by 9 publications

References 42 publications

Numerical Simulation of Magnetic Microstructure in Nanocrystalline Thin Films with the Random Anisotropy

Numerical Simulation of Magnetic Microstructure in Nanocrystalline Thin Films with the Random Anisotropy

Photoinduced changes in the space-modulated magnetic order of a FeBO3:Mg single crystal

Imaging vortex pinning and gyration by time-resolved and in-situ Lorentz microscopy

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