Y. Souche

Université Joseph Fourier

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Co-Authors

A. D. Santos

École Polytechnique

D. Givord

Institut Néel

V. Novosad

Argonne National Laboratory

L. M. Álvarez-Prado

Universidad de Oviedo

Amandine Liénard

Institut Français de la Vigne et du Vin

J.L. Porteseil

Université Grenoble Alpes

J. M. Alameda

Universidad de Oviedo

Adriana Pedrosa Biscaia Tufaile

Universidade de São Paulo

J. P. Rebouillat

Institut Néel

M. Schlenker

Institut Néel

Cooperative Institutions

Centre National de la Recherche Scientifique

Institut Néel

Université Joseph Fourier

Université Grenoble Alpes

Institut polytechnique de Grenoble

Imagerie par Résonance Magnétique Médicale et Multi-Modalités

Universidade de São Paulo

Institute of Magnetism

La Roche College

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

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Imaging of domain wall motion in small magnetic particles through near-field microscopy

Applied Physics Letters (2006)

J. Schoenmaker Antônio Domingues dos Santos Y. Souche Antônio Carlos Seabra L. C. Sampaio

We report magneto-optical scanning near-field optical microscopy images for 4×4×0.08μm3 and 16×16×0.08μm3 low magnetic anisotropy Co70.4Fe4.6Si15B10 particles. Measuring magneto-optical differential susceptibility we acquired images of the domain wall movement driven by an applied magnetic field with a spatial resolution better than λ∕4. For the 4×4×0.08μm3 sized particle, a sequence of 27 magneto-optical differential susceptibility images reveals the evolution of the magnetic domain structure between positive and negative saturation fields passing through the four-domain flux-closure magnetization structure. On the 16×16×0.08μm3 particle, we studied the role of the oscillating driving field on the susceptibility distribution. Comparing the different magneto-optical differential susceptibility sequences, the role of the shape anisotropy on the field induced domain wall movement is evidenced. Micromagnetic simulations were used to provide a better understanding of the domain wall movement.

Domain wall (magnetism)

Saturation (graph theory)

Single domain

10.1063/1.2172016

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Citations (7)

Optical Search for QED vacuum magnetic birefringence, Axions and photon Regeneration

P. Pugnat G. Vitrant J. Zicha Jan Hošek Y. Souche

Source

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Citations (7)

Domains in small niFe shapes: anisotrophy versus magnetic poles

International Conference on Magnetics (1990)

C. Coquaz D. Challeton Y. Souche J.L. Porteseil

The trend toward increased information densities creates a need for miniaturized heads. Such tiny magnetic objects contain but a few domains, and can not be assimilated to a homogeneous medium with a uniform permeability. This work is a study of the micromagnetic structure of soft NiFe layers used in magnetic heads.

Micromagnetics

Relative permeability

10.1109/intmag.1990.734947

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Transverse Kerr effect in amorphous thin film R-Co alloys

Journal of Magnetism and Magnetic Materials (1992)

O. Cugat D. Givord J. P. Rebouillat Y. Souche

10.1016/0304-8853(92)90849-j

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Citations (6)

Local hysteresis loop measurements by magneto-optical scanning near-field optical microscope

Journal of Applied Physics (2005)

J. Schoenmaker Antônio Domingues dos Santos Antônio Carlos Seabra Y. Souche Jean-Pierre Jamet

We performed magnetic-field-induced experiments on micron-sized patterned Co70.4Fe4.6Si15B10 square thin-film elements with in-plane magnetic anisotropy by magneto-optical scanning near-field optical microscopy (MO-SNOM) with a spatial resolution better than 200nm. Markedly different local hysteresis loops (LHLs) were measured on selected positions in one element. Some LHLs presented an unusual shape intrinsic of local magnetic-field-induced process. Comparison of the MO-SNOM imaging results with high-resolution far-field Kerr microscopy has confirmed the local character of the MO-SNOM measurements. This has also helped us to understand the unusual LHLs shapes as related to the field-induced rearrangement of the domain structure within the square element during the magnetization process. The magnetic structure in small field is well described by two overlapping four-domain flux-closure configurations that are well modeled by micromagnetic calculations.

Hysteresis

10.1063/1.2115089

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Citations (12)

Efeito kerr magneto-optico aplicado a caracterizacao da magneto-impedancia gigante em fitas amorfas

Resumos (1995)

L. G. C. Melo A. D. Santos F.L.A. Machado S. M. Rezende Y. Souche

Magneto

Source

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A Led Based Transverse Magneto-Optical Kerr Effect Magnetometer

7th Joint MMM-Intermag Conference. Abstracts (Cat. No.98CH36275) (1998)

Adriana Pedrosa Biscaia Tufaile A. D. Santos Y. Souche

Magneto-optic Kerr effect

Magneto

10.1109/intmag.1998.735575

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Magneto‐optical scanning near‐field microscope

physica status solidi (a) (2006)

L. M. Álvarez-Prado J. Schoenmaker A. D. Santos Thierry Fournier Y. Souche

Abstract A set‐up able to achieve a magnetic characterization at a sub‐micron scale will be presented. Together with topographic and optical images, it is possible to plot local hysteresis loops (LHL) and magneto‐optical differential susceptibility (MODS) using a transverse MOKE‐like configuration. We will show how MODS allows to follow the evolution of the wall and domains on a micron sized object. A comparison between the images of domains and the micromagnetic simulations on several micron sized objects will be finally presented. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Hysteresis

Characterization

Plot (graphics)

10.1002/pssa.200566173

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Citations (2)

Period competition in a stripe domain structure subjected to a periodic field

Journal of Applied Physics (1988)

P. Molho J.L. Porteseil Y. Souche

The behavior of a parallel array of stripe domains subjected to a periodic field was studied. Experiments were performed on a layer of single-crystal ferrimagnetic garnet (bubble material) featuring in zero field a periodic pattern of parallel stripe domains. The layer was applied to a magnetic tape on which a sinusoidal waveform was recorded. The garnet-tape distance, and hence the interaction strength, could be varied. The resulting domain patterns were observed in polarized light. We present results obtained for a recorded wavelength (66 μm) equal to six times the natural domain period (11 μm). The domain structure adapted itself by reducing the number of stripes, in particular by means of dislocation glide in the stripe array. This resulted in various modulated stripe patterns. The transitions between structures with different stripe numbers could be observed. These were achieved by local distortions of the parallel array around dislocations. The total energy of the garnet layer was calculated as the sum of magnetostatic, wall, and interaction energies for various interaction strengths. The equilibrium domain configuration could be deduced by minimizing the energy with respect to wall positions. The calculated modulated domain structures are in agreement with the observed one.

Ferrimagnetism

Domain wall (magnetism)

10.1063/1.340190

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Citations (4)

Frontmatter

EDP Sciences eBooks (1999)

Groupe Usinor Michel Cyrot -Michel Decorps -Bernard Dieny Olivier Geoffroy -Damien Glgnoux C. Lacroix

Illustrations de la page de couverture (de gauche a droite) : en haut, bulles magnetiques (Laboratoire Louis Neel) ; en bas, source 4 teslas (Laboratoire d'Electrotechnique de Grenoble) ; en haut, tete inductive pour 1'enregistrement helicoidal sur bande (d'apres document LETI-ARTECHNIQUE) ; en bas, picoslider contenant une tete magnetique planaire montee sur une suspension integree (d'apres document LETI-ARTECHNIQUE).

10.1051/978-2-7598-0132-9.fm

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