Search results
Results from the WOW.Com Content Network
Soft materials are important in a wide range of technological applications, and each soft material can often be associated with multiple disciplines. Liquid crystals, for example, were originally discovered in the biological sciences when the botanist and chemist Friedrich Reinitzer was investigating cholesterols. [10]
Material & heterostructure used for the characterization (electrodes/material, electrode/substrate) Orientation Piezoelectric coefficients, d (pC/N) Relative permittivity, ε r Electromechanical coupling factor, k Quality factor Hutson 1963 [2] AlN d 15 = -4.07per ε 33 = 11.4 d 31 = -2 d 33 = 5 Cook et al. 1963 [3] BaTiO 3: d 15 = 392 ε 11 ...
Most non-magnetic materials have a relatively small χ (on the order of a millionth), but soft magnets can have χ on the order of hundreds or thousands. For materials satisfying M = χ H , we can also write B = μ 0 (1 + χ ) H = μ 0 μ r H = μ H , where μ r = 1 + χ is the (dimensionless) relative permeability and μ =μ 0 μ r is the ...
"Soft" magnetic materials with low coercivity and hysteresis, such as silicon steel, or ferrite, are usually used in cores. Magnetic field (green) created by a current-carrying winding (red) in a typical magnetic core transformer or inductor, with the iron core C forming a closed loop, possibly with air gaps G in it. The drawing shows a section ...
Ferromagnetic materials with high coercivity are called magnetically hard, and are used to make permanent magnets. Materials with low coercivity are said to be magnetically soft. The latter are used in transformer and inductor cores, recording heads, microwave devices, and magnetic shielding.
While many traditional magnetic materials, such as magnetite, are also semiconductors (magnetite is a semimetal semiconductor with bandgap 0.14 eV), materials scientists generally predict that magnetic semiconductors will only find widespread use if they are similar to well-developed semiconductor materials. To that end, dilute magnetic ...
Molecule-based magnets (MBMs) or molecular magnets are a class of materials capable of displaying ferromagnetism and other more complex magnetic phenomena. This class expands the materials properties typically associated with magnets to include low density, transparency, electrical insulation, and low-temperature fabrication, as well as combine magnetic ordering with other properties such as ...
Novel and special magnetic materials; Fe-Ni, Fe-Co, amorphous and nanocrystalline alloys; Composites, powder cores and ferrites; Power applications (e.g. motors, transformers and actuators) Sensors, high frequency and electronic applications; Modelling, simulation or prediction of material and device performance; Design of electromagnetic ...