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A neodymium magnet (also known as NdFeB, NIB or Neo magnet
A neodymium magnet (also known as NdFeB, NIB or Neo magnet

Chemically prepared magnetic nanoparticles
Chemically prepared magnetic nanoparticles

Choi_uta_2502M_13250
Choi_uta_2502M_13250

... behavior is described based on exchange anisotropy between a ferromagnetic layer and antiferromagnetic layer. 1.1 Ferroelectricity There are a few materials in the nature that exhibit a spontaneous electric polarization which is reversible when an external electric field is applied. These are called ...
Chiral liquid crystals
Chiral liquid crystals

- TDDFT.org
- TDDFT.org

Stannides and Intermetallic Tin Compounds
Stannides and Intermetallic Tin Compounds

ElaStic: A universal tool for calculating elastic constants from first
ElaStic: A universal tool for calculating elastic constants from first

Fracture of granular materials composed of arbitrary grain
Fracture of granular materials composed of arbitrary grain

... and solid contacts, it can be used in the framework of non-smooth or smooth methods. In the following, section 2 first describes the method used to solve contact situations and then gives a comprehensive description of the cohesive interaction model which has been developed. Section 3 presents resu ...
4. Properties and Characterization of Thin Films
4. Properties and Characterization of Thin Films

... multiplayer coatings for optical applications. It measures the optical thickeness nd so that it allows for a compensation of changes in the refractive index n by corresponding changes of the film thickness d. With a photometer (see Fig. 4.4.) the intensity of light reflected on both interfaces of th ...
Ductile fracture
Ductile fracture

(131904) Topic: Fracture of Metal Temperature Embrittlement
(131904) Topic: Fracture of Metal Temperature Embrittlement

... many metals. Even very small amount of hydrogen can cause cracking in steel and titanium. It may be introduced during melting and entrapped during solidification, or it may be picked up during heat treatment, acid pickling, electroplating or welding. ...
006_Material properties - SAFIR manual - UEE
006_Material properties - SAFIR manual - UEE

... Table 1 shows an overview of the materials implemented in SAFIR®. Most commonly used materials in structural engineering are available for thermal and mechanical analyses, namely concrete, steel and wood. Several types of stainless steel, aluminum and high strength concrete (HSC) can also be used. T ...
view - The Long Group - University of California, Berkeley
view - The Long Group - University of California, Berkeley

... have already been published.1–4 Here, we will mainly focus on compounds that exhibit both long-range magnetic order and well-established porosity, as demonstrated through the reversible uptake of host molecules (either as a gas or a liquid). Employing relevant examples, we will particularly emphasiz ...
Influence of the Tool Geometry on the Machining of
Influence of the Tool Geometry on the Machining of

... characterized by very good mechanical properties such as hardness, strength and wear resistance, but also by its high corrosion resistance and rigidity. In addition, the cobalt-based alloy has a very high strength and is stable, even at high temperatures [10]. Many of the characteristics of this all ...
Immobilization of Metal Hexacyanoferrate Ion
Immobilization of Metal Hexacyanoferrate Ion

... hydrated radius such as Na+ , Ca2+ , etc. The recovery of target metal can also proceed through a reactive precipitation involving the simultaneous binding of the radionuclide and the formation of the metal hexacyanoferrate [7,8]: the precursors (alkali metal ferrocyanide and metal salt) are mixed w ...
Mechanical Response of Porous Scaffolds for Cartilage Engineering
Mechanical Response of Porous Scaffolds for Cartilage Engineering

... measured experimentally and predicted using a composite-model theory, relating tissue microstructure to macroscopic material stiffness. The tissue was altered by several treatment protocols to provide a wide range of collagen-fibril volume fractions (0.015–0.15). The rate of change of tissue modulus ...
Physics of Magnetism and Magnetic Materials
Physics of Magnetism and Magnetic Materials

... and it was known that a piece of iron would become magnetized when rubbed with it. More serious efforts to use the power hidden in magnetic materials were made only much later. For instance, in the 18th century smaller pieces of magnetic materials were combined into a larger magnet body that was fou ...
Cadmium zinc telluride and its use as a nuclear radiation detector
Cadmium zinc telluride and its use as a nuclear radiation detector

... In this review we have attempted to present a balanced overview of what is the result of a great deal of effort by many researchers around the world who have contributed to the development of CZT as a nuclear radiation detector material. Invariably when writing such a review one cannot ensure that a ...
High cycle multiaxial fatigue crack initiation : experimental
High cycle multiaxial fatigue crack initiation : experimental

... The size of the representative element volume (REV) is defined in terms of the mechanical behaviour of a material in order to accurately reflect its macroscopic behavior. The size of the REV depends on the considered phenomenon. The definition of the REV size, in terms of it constitutive behaviour i ...
The Luminescent Properties of Yttrium Oxyapatite Doped
The Luminescent Properties of Yttrium Oxyapatite Doped

On small deformation interfacial debonding in composite materials
On small deformation interfacial debonding in composite materials

... This paper presents an integrated theoretical and computational investigation into the macroscopic behavior of composite materials containing multi-phase reinforcing particles with simultaneous nonlinear debonding along the microconstituent interfaces. The interfacial debonding is characterized by t ...
FASCICLE II, SUPPLEMENT, YEAR II (XXXI) 2008
FASCICLE II, SUPPLEMENT, YEAR II (XXXI) 2008

... Departament of tehnique, Industrial School Group Metallurgic Galati, Romania ...
Study on the Effect of Magnetic Fields on Polymeric Materials and Its
Study on the Effect of Magnetic Fields on Polymeric Materials and Its

... Fiber alignments are also possible for suspensions with much higher fiber concentrations. Figure 5 shows short PBO fibers magnetically aligned perpendicular to the film surface followed by solidification of the matrix liquid by polymerization. A similar experiment is also carried out for other organ ...
Meta-tarbernite 1, its physical properties and relation to Torbernite.
Meta-tarbernite 1, its physical properties and relation to Torbernite.

... observed, nor did the optical properties change as in the c~Tstals previously examined; not until the mineral was placed over concentrated acid did a loss in weight set in, and the change was then very slow, 0.06 gram being lost during three months. Weighings made at intervals after this show that a ...
Characterization and Modeling of Pores and Surfaces in - J
Characterization and Modeling of Pores and Surfaces in - J

... niques can address outstanding issues regarding the development of the complex hydrated microstructure, and by showing how predictions of mechanical and transport properties can be made from this microstructure. Suggestions are then made as to how future models might be directed to overcome the rema ...
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History of metamaterials



The history of metamaterials begins with artificial dielectrics in microwave engineering as it developed just after World War II. Yet, there are seminal explorations of artificial materials for manipulating electromagnetic waves at the end of the 19th century.Hence, the history of metamaterials is essentially a history of developing certain types of manufactured materials, which interact at radio frequency, microwave, and later optical frequencies.As the science of materials has advanced, photonic materials have been developed which use the photon of light as the fundamental carrier of information. This has led to photonic crystals, and at the beginning of the new millennium, the proof of principle for functioning metamaterials with a negative index of refraction in the microwave range at 10.5 Gigahertz. This was followed by the first proof of principle for metamaterial cloaking (shielding an object from view), also in the microwave range, about six years later. However, a cloak that can conceal objects across the entire electromagnetic spectrum is still decades away. Many physics and engineering problems need to be solved.Nevertheless, negative refractive materials have led to the development of metamaterial antennas and metamaterial microwave lenses for miniature wireless system antennas which are more efficient than their conventional counterparts. Also, metamaterial antennas are now commercially available. Meanwhile, subwavelength focusing with the superlens is also a part of present-day metamaterials research.
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