Permittivity features of multilayer nanoisland systems [FeNi–Al2O3]

Noskova, D.D.; Pudonin, F. A.; Sherstnev, I. A.; Eroshenko, G.N.; Egorov, D. A.; Shadrin, A.M.

doi:10.1016/j.physleta.2021.127546

Cited by 6 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The presence of the optical nonreciprocity effect in multilayer systems with island layers of Ag means that such structures are chiral, and the occurrence mechanism of the nonreciprocity effect is nonmagnetic. As was shown earlier [11,18], the existence of the optical nonreciprocity effect in multilayer island systems essentially depends on how close the metal island layers are to each other. It was assumed that the magnitude of the nonreciprocity effect depends on the 'interaction' between the island layers, i.e.…”

Section: Measurementmentioning

confidence: 71%

“…preliminary studies of such magnetic island structures have shown that the magnitude of the nonreciprocity effect (as well as permittivity) can significantly depend on the interaction between island metal layers [11]. It is important to note that the chirality effects are suppressed when the thickness of metal magnetic layers in multilayer structures exceeds the percolation threshold for a metal magnetic film, i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al₂O₃]_N

Noskova

Pudonin

Sherstnev

et al. 2023

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

We study the effect of optical nonreciprocity in [Ag--Al2<\sub>O<sub>3<\sub>]<sub>N<\sub> multilayer structures. The percolation threshold for Ag films was found to be d* ≈ 2 nm. An anomalously large optical nonreciprocity effect was found in the structures with Ag island layers. This effect appeared as a change in the reflected light polarization (Δω) when the sample was rotated around its axis from the initial position by 180°. The effect magnitude reached Δωmax<sub> ≈ 7°. We suggest that a possible mechanism for the optical nonreciprocity effect in these structures can be related to the excitation of localized plasmons in Ag islands. We show that Δω essentially depends on the interlayer and intralayer interaction between Ag layers in multilayer structures and is suppressed in the case of strong intralayer and interlayer interaction of plasma oscillations.

show abstract

Section: Measurementmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al₂O₃]_N

Noskova

Pudonin

Sherstnev

et al. 2023

J. Phys.: Condens. Matter

Self Cite

View full text Add to dashboard Cite

show abstract

“…При увеличении толщины слоев Al 2 O 3 Re(ε) проходит через 0 и становится положительной, как это и должно быть для структур с диэлектрическим характером проводимости. Отметим, что ранее, подобное поведение Re(ε) было обнаружено и в магнитных островковых структурах [10]. Такое изменение знака Re(ε) наблюдается во всём спектральном диапазоне.…”

Section: измерения и результатыunclassified

“…Это значит, что и в многослойных системах из немагнитных наноостровов также может наблюдаться эффект оптической невзаимности. Мы полагаем, что в этом случае эффект невзаимности может быть связан с особенностями поведения диэлектрической проницаемости в немагнитных островковых системах [10]. Существуют также другие системы, в которых невзаимность не зависит от магнитного поля, например [11][12][13].…”

Section: Introductionunclassified

Эффект оптической невзаимности в многослойных наноостровковых системах на основе Bi

Шадрин¹,

Носкова²,

Пудонин³

et al. 2023

Физика Твердого Тела

View full text Add to dashboard Cite

In multilayer non-magnetic structures with island layers Bi ([Bi-Al2O3]N) - at room temperature, an abnormally large optical non-reciprocity effect was detected. It is shown that this effect can be closely related to the behavior of dielectric permittivity in Bi nanostructured layers. It is found that in these multilayer island systems, the metallic nature of the optical response of the dielectric constant (Re(ε) is observed<0) in the optical range when the thickness of the dielectric layer of Al2O3 is less than 1.6 nm. It is assumed that the island systems [Bi-Al2O3]N exhibit the properties of "left" metamaterials with negative μ and ε in the optical range.

show abstract

“…As an example, Fig. 1(c) shows the scanning electron microscopy (SEM) image of the nanoisland FeNi film grown on the Sitall substrate [13]. As schematically shown in Fig.…”

mentioning

confidence: 99%

Bismuth layer properties in the ultrathin Bi-FeNi multilayer films probed by spectroscopic ellipsometry

Kovaleva,

Chvostova,

Pacherova

et al. 2023

Preprint

View full text Add to dashboard Cite

Using wide-band (0.5-6.5 eV) spectroscopic ellipsometry we study ultrathin [Bi(0.6-2.5 nm)-FeNi(0.8,1.2 nm)]N multilayer films grown by rf sputtering deposition, where the FeNi layer has a nanoisland structure and its morphology and magnetic properties change with decreasing the nominal layer thickness. From the multilayer model simulations of the ellipsometric angles, Ψ(ω) and ∆(ω), the complex (pseudo)dielectric function spectra of the Bi layer were extracted. The obtained results demonstrate that the Bi layer can possess the surface metallic conductivity, which is strongly affected by the morphology and magnetic properties of the nanoisland FeNi layer in the GMR-type Bi-FeNi multilayer structures.

show abstract

Permittivity features of multilayer nanoisland systems [FeNi–Al2O3]

Cited by 6 publications

References 18 publications

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al₂O₃]_N

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al₂O₃]_N

Эффект оптической невзаимности в многослойных наноостровковых системах на основе Bi

Bismuth layer properties in the ultrathin Bi-FeNi multilayer films probed by spectroscopic ellipsometry

Contact Info

Product

Resources

About

Permittivity features of multilayer nanoisland systems [FeNi–Al2O3]

Cited by 6 publications

References 18 publications

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al2O3] N

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al2O3] N

Эффект оптической невзаимности в многослойных наноостровковых системах на основе Bi

Bismuth layer properties in the ultrathin Bi-FeNi multilayer films probed by spectroscopic ellipsometry

Contact Info

Product

Resources

About

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al₂O₃]_N

Optical nonreciprocity in multilayer nanoisland systems of [Ag–Al₂O₃]_N