Magneto-optical properties of magnetic nanocomposites

Ганьшина, Е. А.; Kochneva, M.; Vashuk, M. V.; Vinogradov, A. N.; Granovsky, A. B.; Gushchin, V. S.; Shcherbak, P. N.; Kim, Chong-Oh; Kim, Cheol Gi

doi:10.1134/s0031918x06140079

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…That is why optical and MO investigation techniques are of much interest, since they possess a number of advantages, the main of which is that these methods are sensitive to presence of magnetic heterogeneities, to changes of particle shape and size, their threedimensional distribution and appearance of new magnetic phases. This is confirmed by recent investigations of optical and MO spectra of granular systems [4,[7][8][9][10][11][12][13], that revealed many particularities of linear and non-linear optical and MO Kerr effect and many other properties.…”

Section: Introductionsupporting

confidence: 73%

Magnetooptical Properties of Layer-by-Layer Deposited Ferromagnet—Dielectric Nanocomposites

Buravtsova¹,

Ганьшина²,

Kirov³

et al. 2013

MSA

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The present work was initiated to investigate how technology of preparation of nanocomposites (Co₄₅Fe₄₅Zr₁₀) Z(Al₂O₃)_1-Z affects their magneto-optical (MO) properties. The spectral, magnetic field and concentration dependences of the transversal Kerr effect (TKE) have been studied either for bulk or layer-by-layer deposited nanocomposites within a wide range of the ferromagnetic (FM) phase concentrations and for various thicknesses of layers. It was found that the MO response of the layer-by-layer deposited nanocomposites with compositions inside the percolation interval differs essentially from the one of the bulk composites and depends on the layer thicknesses. With decreasing thicknesses of layers the percolation threshold has been shifted towards the lower contents of the FM phase. In addition, it has been established that the size and shape of the granules inside the nanocomposite layer also depends on the layer thickness as well as the microstructure of the layer-by-layer sputtered composites considerably differs from the microstructure of the bulk nanocomposite.

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Section: Introductionsupporting

confidence: 73%

Magnetooptical Properties of Layer-by-Layer Deposited Ferromagnet—Dielectric Nanocomposites

Buravtsova¹,

Ганьшина²,

Kirov³

et al. 2013

MSA

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“…There is a need for refining upon the customary theoretical treatment of peculiarities in the optic spectra of 3d metal-based oxide compounds. (1) [16], YCrO 3 [17], and LaCrO 3 [17] (lines 1, 2, and 3, resp.) are shown.…”

Section: Resultsmentioning

confidence: 99%

“…The computed total contribution of all electric-dipole-allowed strong and weak CT transitions to the imaginary part ε 2 of the diagonal permittivity tensor component ε = ε 1 + iε 2 is presented in the main panel. The experimental spectra for Lu 0.85 Y 0.15 CrO 3 [16], YCrO 3 [17], and LaCrO 3 [17] converted by us from optic conductivity to permittivity are shown in the inset (lines 1, 2, and 3, resp.). The computation results reasonably agree with them.…”

Section: Modeling Of the Ct Transition Band In Chromitesmentioning

confidence: 99%

Optics of Chromites and Charge‐Transfer Transitions

Zenkov¹

2008

Physics Research International

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Specific features of the charge-transfer (CT) states and O 2p → Cr 3d transitions in the octahedral (CrO 6 ) 9− complex are considered in the cluster approach. The reduced matrix elements of the electric-dipole transition operator are calculated on many-electron wave functions of the complex corresponding to the initial and final states of a CT transition. Modeling the optic spectrum of chromites has yielded a complicated CT band. The model spectrum is in satisfactory agreement with experimental data which demonstrates the limited validity of the generally accepted concept of a simple structure of CT spectra.

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“…The interactions of Co nanocomposite films consisting of Co particles and different matrices have been the subject of many studies [28][29][30][31][32][33]. When the conductive Au matrix is replaced with other nonconductive materials, for example, TiO 2 [28,29] and Sm 2 O 3 , the magnetoresistance dependence on Co concentration in a similar granular thin film structure also shows strong correlation with magnetooptical properties.…”

Section: Discussionmentioning

confidence: 99%

Experimental Correlation between Nonlinear Optical and Magnetotransport Properties Observed in Au-Co Thin Films

Yang

Kryutyanskiy

Kolmychek

et al. 2016

Journal of Nanomaterials

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Magnetic materials where at least one dimension is in the nanometer scale typically exhibit different magnetic, magnetotransport, and magnetooptical properties compared to bulk materials. Composite magnetic thin films where the matrix composition, magnetic cluster size, and overall composite film thickness can be experimentally tailored via adequate processing or growth parameters offer a viable nanoscale platform to investigate possible correlations between nonlinear magnetooptical and magnetotransport properties, since both types of properties are sensitive to the local magnetization landscape. It has been shown that the local magnetization contrast affects the nonlinear magnetooptical properties as well as the magnetotransport properties in magnetic-metal/nonmagnetic metal multilayers; thus, nanocomposite films showcase another path to investigate possible correlations between these distinct properties which may prove useful for sensing applications.

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Magneto-optical properties of magnetic nanocomposites

Cited by 5 publications

References 6 publications

Magnetooptical Properties of Layer-by-Layer Deposited Ferromagnet—Dielectric Nanocomposites

Magnetooptical Properties of Layer-by-Layer Deposited Ferromagnet—Dielectric Nanocomposites

Optics of Chromites and Charge‐Transfer Transitions

Experimental Correlation between Nonlinear Optical and Magnetotransport Properties Observed in Au-Co Thin Films

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