Magneto-optical properties

Nanocomposites containing metal nanoparticles have attracted a great deal of attention, with resulting magneto-optical properties that strongly depend on the structure, size, and dispersion of the embedded particles looking for their scientific and industrial applications in areas such as optical fiber sensors, optical isolators, information storage, and so on. The narrow particle size distribution and 

When a material exhibits this effect in an appreciable way, it is referred to as a Faraday or Kerr rotator. In ferri- and ferromagnetic materials, a physical constant F describing the Faraday effect is the Faraday rotation at saturation magnetization Ms per unit path length, which is the specific Faraday rotation. These magnitudes are related by means of the constant of Kundt K that is the ratio of Verdefs constant to magnetic susceptibility  

The preparation of magnetic transparent composites was first described by Ziolo et al. in 1992 [40]. The synthetic route involves the use of preorganized biomolecular networks as chemically and spatially confined environments for 

It is important to reduce the size of the magnetic particles in the composite in order to obtain superparamagnetic behavior, allowing the sample to be used as a low magnetic field sensor. Optical measurements showed that as the size of the magnetic particle decreases, a blueshift in the UV-vis absorption spectra occurs, which is related to quantum confinement effects. 

The magneto-optical properties of the y-Fe203 nanocomposites were measured by embedding blocks of the material inside an acrylic resin and polishing until plates are obtained with a thickness ranging from 0.2 to 1 mm. The experimental setup to get the Faraday rotation spectrum is based on a Xenon light source, a monochromator (with a resolution of 1 nm), an optical power meter, two near-infrared (IR) polarizers with their axes at 45°, and an electromagnet with tapered 

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Blinov L M 1983 Electro-optical and Magneto-optical Properties of Liquid Crystals (Chichester Wiley)... 

Yanata, Y, Suzuki, K and Oka, Y. (1993) Magneto-optical properties of CdMnSe microcrystallites in SiO glass prepared hy rfsputtering./. Appl. Phys., 73,4595-4598. 

An example of this process of data analysis is provided by the work of Yubero et al. (2000), who studied the structure of iron oxide thin films prepared at room temperature by ion beam induced chemical vapour deposition. Such films find important applications because of their optical, magnetic, or magneto-optical properties. They were produced by bombardment of a substrate with Oj or Oj + Ar+ mixtures, and Figure 4.15 shows RBS spectra of two iron oxide thin films prepared on a Si substrate by each of these bombardment methods. 

Magneto-optical properties of (In,Mn)As and (Ga,Mn)As have been studied in order to elucidate the origin of ferromagnetism as well as to explore the possibility of using these materials as Faraday isolators, suitable for monolithic integration with the existing semiconductor lasers. 

The IR spectra (402) and thermal decomposition (396) of the FeO 3B203 xH20 borates have been measured. The anhydrous iron borates FesBOs and FeB03 exhibit interesting magnetic and magneto-optical properties. In the last 10 years, well over 50 papers have been written on these borates, a few of which have been summarized by Bowden and Thompson (60). 

Valence band ordering and magneto-optical properties... 

Valence Band Ordering and Magneto-Optical Properties of Free and Bound Excitons in ZnO 159... 

In the next section we summarize the theoretical background for coupled cluster response theory and discuss certain issues related to their actual implementation. In Sections 3 and 4 we describe the application of quadratic and cubic response in calculations of first and second hyperpolarizabilities. The use of response theory to calculate magneto-optical properties as e.g. the Faraday effect, magnetic circular dichroism, Buckingham effect, Cotton-Mouton effect or Jones birefringence is discussed in Section 5. Finally we give some conclusions and an outlook in Section 6. 

For nonlinear (magneto-) optical properties, calculations of an accuracy close to that of modern gas phase experiments require - similar to what has also been found for other properties like structures [79, 109], reaction enthalpies [79, 110, 111], vibrational frequencies [112, 113], NMR chemical shifts [114], etc. - at least an approximate inclusion of connected triple excitations in the wavefunction. This has been known for years now from calculations of static hyperpolarizabilities with the CCSD(T) approximation [9-13]. CCSD(T) accounts rather efficiently for connected triples through a perturbative correction on top of CCSD. For the reasons pointed out in Section 2.1 CCSD(T) is, as a two-step approach, not suitable for the calculation of frequency-dependent properties. Therefore, the CC3 model has been proposed [56, 58] as an alternative to CCSD(T) especially designed for use in connection with response theory. CC3 is an approximation to CCSDT - alike CCSDT-la and related methods - where the triples equations are truncated such that the scaling of the computational efforts with system size is reduced to as for CCSD(T),... 

Proceeding from Are gas to the condensed phase many new issues appear. For NLO properties several additional complicaAons arise when an environment interacts with the system under investigation and external fields need to be considered. Already for the gas phase the proper definition of local field factors and the pressure dependence of (magneto-) optical properties is a difficult issue. In condensed phase, an important question is the proper definition of solute properties and the solvent effect for the electronic property itself. We refer the reader to a comprehensive discussion of solvent effects on NLO properties in a later Chapter. Some of the schemes for modeling solvent effects have been employed in connection with calculation of electronic NLO properties, also recenfiy at the CC level [212, 213]. This is still an area where much progress is expected in the coming years. 

B. The magneto-optical properties of NpO + strongly suggest that the highest filled valence orbital has [Pg.244]

MAGNETO-OPTICAL PROPERTIES OF ALLOYS AND INTERMETALLIC COMPOUNDS... 

Magneto-optical properties of binary amorphous 4f-3d alloys. 570... 

Magneto-optical properties of multi-component amorphous alloys based on rare earths... 

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