[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

In this chapter, we will restrict our attention to the ferrites and a few other closely related materials. The great interest in ferrites stems from their unique combination of a spontaneous magnetization and a high electrical resistivity. The observed magnetization results from the difference in the magnetizations of two non-equivalent sub-lattices of the magnetic ions in the crystal structure. Materials of this type should strictly be designated as “ferrimagnetic” and in some respects are more closely related to anti-ferromagnetic substances than they are to ferromagnetics in which the magnetization results from the parallel alignment of all the magnetic moments present. We shall not adhere to this special nomenclature except to emphasize effects, which are due to the existence of the sub-lattices.

Ferromagnetic materials

Interpretation of X-ray Powder Diffraction Patterns . By H. Lipson and H. Steeple. Pp. viii + 335 + 3 plates. (Mac-millan: London; St Martins Press: New York, May 1970.) £4.

X-Ray Diffraction

Platinum-based nanostructured materials: synthesis, properties, and applications.

Designer platinum nanoparticles: Control of shape, composition in alloy, nanostructure and electrocatalytic property

Effect of Heat Treatment on the Structure and Optical Properties of Porous Anodic Titanium Oxide Films

REMOVED: Influence of the Structural Features of Anodic Alumina Membrane on their Permeance

Nanoelectrode arrays are much in demand in electroanalytical chemistry, electrocatalysis, and bioelectrochemistry. One of the promising approaches for the preparation of such systems is templated electrodeposition. In the present study, porous anodic alumina templates are used to prepare Au nanoelectrode arrays. Multistage electrodeposition is proposed for the formation of recessed electrodes with the ability to tune the distance between the surface of the porous template and the top surface of the nanoelectrodes. A set of complementary techniques, including chronoamperometry, coulometry, and scanning electron microscopy, are used to characterize the nanoelectrode arrays. The number of active nanoelectrodes is experimentally measured. The pathways to further improve the recessed nanoelectrode arrays based on anodic alumina templates are discussed.

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Uniform arrays of gold nanoelectrodes with tuneable recess depth.

Linear and nonlinear optical spectroscopy of an array of Au nanorods, embedded in a dielectric matrix, is studied in the spectral range corresponding to specific dispersion points of such a structure. Experimental data is in a good agreement with the results of numerical modelling based on the effective medium model, as well as on linear and nonlinear FDTD simulations.

Optical Spectroscopy of Hyperbolic Plasmonic Metamaterials

Arrays of superconducting nanowires may be useful as elements of novel nanoelectronic devices. The superconducting properties of nanowires differ significantly from the properties of bulk structures. For instance, different vortex configurations of the magnetic field have previously been predicted for nanowires with different diameters. In the present study, arrays of parallel superconducting In nanowires with the diameters of 45 nm, 200 nm, and 550 nm—the same order of magnitude as coherence length ξ—were fabricated by templated electrodeposition. Values of magnetic moment M of the samples were measured as a function of magnetic field H and temperature T in axial and transverse fields. M(H) curves for the arrays of nanowires with 45 nm and 200 nm diameters are reversible, whereas magnetization curves for the array of nanowires with 550 nm diameter have several feature points and show a significant difference between increasing and decreasing field branches. Critical fields increase with a decrease in diameter, and the thinnest nanowires exceed bulk critical fields by 20 times. The qualitative change indicates that magnetic field configurations are different in the nanowires with different diameters. Variation of M(H) slope in small fields, heat capacity, and the magnetic field penetration depth with the temperature were measured. Superconductivity in In nanowires is proven to exist above the bulk critical temperature.

https://www.mdpi.com/2079-4991/12/22/4095/pdf?version=1669027971

Kirill S. Napolskii

Papers

Effect of Heat Treatment on the Structure and Optical Properties of Porous Anodic Titanium Oxide Films

REMOVED: Influence of the Structural Features of Anodic Alumina Membrane on their Permeance

Uniform arrays of gold nanoelectrodes with tuneable recess depth.

Optical Spectroscopy of Hyperbolic Plasmonic Metamaterials

Size-Dependent Superconducting Properties of In Nanowire Arrays