Mixed magnetooptical contrast induced by an inhomogeneous magnetic field in metal films with planar anisotropy

Иванов, В. Э.

doi:10.1134/s1063785009050150

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…The MO images of an inhomogeneous field were observed according to the geometry of the longitudinal Kerr effect (mixed MO contrast [5]) (Fig. 1a).…”

Section: Experimental Methodsmentioning

confidence: 99%

“…In [5], we showed that MO images appear in mag netic metallic (Co) and amorphous (Gd-Co) films with in plane anisotropy that are placed in a highly inhomogeneous magnetic field during observation according to the longitudinal Kerr effect geometry and that the character of these images depends on observa tion conditions and the field configuration. For the polar Kerr effect, the image brightness in a first approximation is proportional to the normal magneti zation component in an indicator film and the normal component of the magnetic field, which makes it pos sible to map the magnetic field.…”

Section: Introductionmentioning

confidence: 99%

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Magnetooptical images of inhomogeneous magnetic fields in metallic films with in-plane anisotropy

Иванов

Lepalovskii

2012

Tech. Phys.

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The magnetooptical (MO) images of the inhomogeneous field created by permanent magnets in magnetic metallic films with in plane anisotropy are experimentally studied. The MO images recorded using the longitudinal Kerr effect are the superposition of two pictures, namely, a polar sensitivity MO image and a longitudinal sensitivity MO image. An analysis of these images after separation shows that the polar sensi tivity MO image reflects the distribution of the inhomogeneous field component that is normal to the surface of an indicator film in an analog manner. The longitudinal sensitivity MO image reflects the angular distri bution of the in plane component of a stray field in an analog manner. The coincidence of the experimental and corresponding simulated MO images makes it possible to interpret the experimental images. In particu lar, it is shown that the specific features detected in the topological characteristics of the inhomogeneous field correspond to experimental singular points. Hidden magnetic images (magnetic bar codes) are shown to be visualized with metallic CoFe films. As an example, the stray field of a magnetic system made of cylindrical magnets is mapped.

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“…The MO images of an inhomogeneous field were observed according to the geometry of the longitudinal Kerr effect (mixed MO contrast [5]) (Fig. 1a).…”

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetooptical images of inhomogeneous magnetic fields in metallic films with in-plane anisotropy

Иванов

Lepalovskii

2012

Tech. Phys.

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“…The use of nanoparticles of FeCo alloy in nanocomposites results in low magnetic coercivity and high magnetization of the materials, which, with high resistivity and tunnel negative magneto resistance, allows them to be used in the development of different magnetoelectronic devices, in particular, magnetic field sensors for high frequency applications. The development of systems with high anisotropy of nanoparticles and respectively increased magnetic coercion allows them to be used to develop high density data storage media [13,14], and to develop devices for visualizing the magnetic field [15,16].…”

Section: Introductionmentioning

confidence: 99%

FERROMAGNETIC RESONANCE SPECTROSCOPY OF COFEZR-CAF<sub>2</sub> GRANULAR NANOCOMPOSITES

Kołtunowicz¹,

Bondariev²,

Sidorenko³

et al. 2020

PIER M

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Results of the study of magnetic properties of nanocomposite samples (CoFeZr) x (CaF 2 ) (100−x) (31 at.% ≤ x ≤ 47 at.%) produced in argon (Ar) and argon with oxygen (Ar with O 2 ) sputtering atmosphere are presented in this paper. The magnetic resonance spectroscopy at room temperature using continuous wave X-band electron spin resonance (ESR) was used for analysis of samples magnetic properties. After analysis it is established that in the case of samples produced in argonsputtering atmosphere the value of g increases with the rise of metal content and for samples produced in argon with oxygen atmosphere the value g decrease with the rise of x. Such a behavior of g(x) is explained by the presence of core-shell structure of NPs represented by ferromagnetic core and antiferromagnetic core that results in quenching of orbital motion of electrons.

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“…Magnetic metal films may become suitable sensors for magneto−optical visualization and mapping of inhomogeneous magnetic fields [1] due to their high functionality: they enable visualization of three components of the inhomogeeous field. The presence of magnetic anisotropy and coercive force in indicating films inhibits appropriate reflection of inhomogeneous fields [2].…”

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confidence: 99%

Effect of thermomagnetic treatments on the domain structure of Finemet amorphous films

Иванов

Lepalovskij

2022

Technical Physics Letters

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Thermomagnetic processing of films of the Finemet type with an easy magnetization axis in the plane under the action of a constant and rotating magnetic field was carried out in order to obtain an isotropic state. After heat treatment in a constant field, the easy magnetization axis was reoriented along the line of action of the field, as a result of which the domain walls were oriented along the new axis. After thermomagnetic treatment in a rotating field, regions with different anisotropy patterns, including isotropic regions, were revealed. Keywords: domain structure, thermomagnetic treatment, rotating magnetic field.

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Mixed magnetooptical contrast induced by an inhomogeneous magnetic field in metal films with planar anisotropy

Cited by 5 publications

References 3 publications

Magnetooptical images of inhomogeneous magnetic fields in metallic films with in-plane anisotropy

Magnetooptical images of inhomogeneous magnetic fields in metallic films with in-plane anisotropy

FERROMAGNETIC RESONANCE SPECTROSCOPY OF COFEZR-CAF<sub>2</sub> GRANULAR NANOCOMPOSITES

Effect of thermomagnetic treatments on the domain structure of Finemet amorphous films

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