Domain Observation and Interpretation

Hubert, A.; Schäfer, Rudolf

doi:10.1007/978-3-540-85054-0_5

Cited by 11 publications

(7 citation statements)

References 177 publications

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“…a. We suppose that in a field of opposite polarity relative to the previous saturation field the transition from ripple domains to a blocked state occurs with increasing angle between magnetization vectors in neighboring magnetic domains, and stray fields from domain walls start to play an important role for 90

^{\circ}

wall stabilization ().…”

Section: Experiments and Resultsmentioning

confidence: 99%

Two-magnon scattering by domain wall induced coupling in Co₂MnGe/Au/Py layer systems

Salikhov

Brüssing

Gross

et al. 2016

Phys. Status Solidi B

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Sample inhomogeneities such as interface roughness, impurities, or crystal lattice dislocations can be the cause for two‐magnon scattering in ferromagnetic thin films. Using an element specific time‐resolved technique, we show experimentally that in Co2MnGe/Au/Ni81Fe19 trilayers the uniform magnetization precession in Ni81Fe19 (Py) layer can be influenced by magnetic stray fields emerging from the domain walls of micrometer size magnetic ripple domains in the Co2MnGe layer. We have found that these stray fields cause a phase shift of the transversal dynamic magnetization component of the precessional motion in the Py layer. We attribute the observed phase slip in precession to the two‐magnon scattering process.

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^{\circ}

wall stabilization ().…”

Section: Experiments and Resultsmentioning

confidence: 99%

Two-magnon scattering by domain wall induced coupling in Co₂MnGe/Au/Py layer systems

Salikhov

Brüssing

Gross

et al. 2016

Phys. Status Solidi B

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“…For a given spin rotation ∆, the width of an uncharged domain wall is δ u ∝ A /Ku, whereas for charged domain walls the width δ c ∝ M 2 s t /Ku depends on the film thickness t and the saturation magnetization of the material. Similarly, the energy of an uncharged domain wall E u ∝ √ AK u , while numerical simulations suggest that the energy E c of charged domain walls roughly scales with M 2 s t [23][24][25]. These expressions give an indication of how the domain wall widths and energies are expected to scale with the magnetic parameters and the film thickness.…”

Section: Modeling and Analysismentioning

confidence: 93%

Competition between exchange and magnetostatic energies in domain pattern transfer from BaTiO3 (111) to a Ni thin film

Franke

Ophus

Schmid

et al. 2023

Phys. Rev. Materials

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We use spin polarized low energy electron microscopy to investigate domain pattern transfer in a multiferroic heterostructure consisting of a (111)-oriented BaTiO3 substrate and an epitaxial Ni film. After in-situ thin film deposition and annealing through the ferroelectric phase transition, interfacial strain transfer from ferroelastic domains in the substrate and inverse magnetostriction in the magnetic thin film introduce a uniaxial in-plane magnetic anisotropy that rotates by 60 • between alternating stripe regions. We show that two types of magnetic domain wall can be initialized in principle. Combining experimental results with micromagnetic simulations we show that a competition between the exchange and magnetostatic energies in these domain walls have a strong influence on the magnetic domain configuration.

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“…Permalloy (Fe-Ni alloy with 78% to 82% Ni) marked its importance as an exceptional soft magnetic transition metal alloy with outstanding properties like very low coercivity, high permeability, high saturation magnetization, low Gilbert damping and quasi-zero magnetostriction [14][15][16][17]. Over the years, permalloy has been a primary choice for fundamental research on magnetism and extensively used in cutting-edge technologies such as ultra-fast data storage devices like MRAM and racetrack memory, read/write head sensors, fluxgate sensors and high-frequency microwave devices [7,[18][19][20][21][22][23]. The characteristics of efficient magnetization switching and low gilbert damping are intricately linked to alloy composition, deposition method, substrate material, doping, , film thickness and annealing conditions [11,13,[24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Magnetization dynamics and domain reversal in electrodeposited permalloy thin films: impact of thickness and annealing treatment

Dev,

Reddy,

Medwal

et al. 2024

Phys. Scr.

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The domain reversal and magnetization dynamics of electrodeposited permalloy (Fe20Ni80) thin films on conducting ITO/glass substrate was investigated using Magneto-optic Kerr effect microscopy and ferromagnetic resonance. Permalloy thin films were electrodeposited with thickness ranging from 66 nm to 330 nm. Synchrotron XRD confirmed the deposited permalloy in FCC phase without any impurity. The squared hysteresis with very low coercivity (Hc ~ 5 Oe) established soft magnetic nature of the films. Further, angular MOKE hysteresis measurements with simultaneous domain imaging revealed four-fold surface anisotropy in as-deposited film ensuing magnetization reversal via branched and ripple domains. The annealing treatment in Ar+H2 atmosphere removed surface anisotropy and renovated the magnetization reversal through 180˚ branched domains with rapid magnetization switching. Ferromagnetic resonance spectroscopy discloses reduction in the gyromagnetic ratio (γ) as well as in Gilbert damping parameter (α) as the film thickness increases. The lowest Gilbert damping for 330 nm film measured at 0.022, which further reduced to 0.018 after annealing. The combination of rapid magnetization switching and low Gilbert damping in the electrodeposited permalloy thin films render them promising for implementation in high-frequency microwave devices devices and magnetic sensors.

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Domain Observation and Interpretation

Cited by 11 publications

References 177 publications

Two-magnon scattering by domain wall induced coupling in Co₂MnGe/Au/Py layer systems

Two-magnon scattering by domain wall induced coupling in Co₂MnGe/Au/Py layer systems

Competition between exchange and magnetostatic energies in domain pattern transfer from BaTiO3 (111) to a Ni thin film

Magnetization dynamics and domain reversal in electrodeposited permalloy thin films: impact of thickness and annealing treatment

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Domain Observation and Interpretation

Cited by 11 publications

References 177 publications

Two-magnon scattering by domain wall induced coupling in Co2MnGe/Au/Py layer systems

Two-magnon scattering by domain wall induced coupling in Co2MnGe/Au/Py layer systems

Competition between exchange and magnetostatic energies in domain pattern transfer from BaTiO3 (111) to a Ni thin film

Magnetization dynamics and domain reversal in electrodeposited permalloy thin films: impact of thickness and annealing treatment

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Two-magnon scattering by domain wall induced coupling in Co₂MnGe/Au/Py layer systems

Two-magnon scattering by domain wall induced coupling in Co₂MnGe/Au/Py layer systems