摘要:
A method for manufacturing magnetic field detection devices is described, said method comprising the operations of manufacturing a magneto-resistive. element (10, 20) comprising regions with metallic conduction (13, 23) and regions with semi-conductive conduction (11, 31). Said method comprises the following operations: - forming metallic nano-particles (37) to obtain said regions with metallic conduction (13, 23); - providing a semiconductor substrate (31); - applying said metallic nano-particles (37) to said semiconductor substrate (31) to obtain a disordered mesoscopic structure. A magnetic device is also described, comprising a spin valve, said spin valve (110) comprising a plurality of layers (111, 112, 113, 114, 115, 116, 117) arranged in a stack which in turn comprises at least one free magnetic layer (111) able to be associated to a temporary magnetisation (MT), a spacer layer (133) and a permanent magnetic layer (112) associated to a permanent magnetisation (MP). The spacer element (133) is obtained by means of a mesoscopic structure of nanoparticles in a metallic matrix produced in accordance with the method for manufacturing magnetoresistive elements of the invention.
摘要:
An emitter (F) for incandescent light sources, in particular a filament, capable of being brought to incandescence by the passage of electric current is obtained in such a way as to have a value of spectral absorption α that is high in the visible region of the spectrum and low in the infrared region of the spectrum, said absorption α being defined as α=1-ρ-τ, where ρ is the spectral reflectance and τ is the spectral transmittance of the emitter.
摘要:
A device for detecting magnetic fields, of the type comprising at least one element made of hard magnetic material (12) and an element made of soft magnetic material (13) associated to an element made of semiconductor material (11), means (15) for forcing a current (I) in said semiconductor material (11), characterised in that said element made of hard magnetic material (12) and element made of soft magnetic material (13) are positioned in planar fashion on said element made of semiconductor material (11).
摘要:
Magnetic pressure sensor device, of the type comprising at least one magnetic layer (11) able to vary a magnetisation associated thereto in response to a pressure (P) exerted thereon. Said device (20; 30; 40; 50) comprises a plurality of layers (11, 12, 13, 14, 15, 16, 17) arranged in a stack, said magnetic layer (11) able to vary a magnetisation associated thereto in response to a pressure (P) comprising a free magnetic layer (11), able to be associated to a temporary magnetisation (MT), said free magnetic layer (11) belonging to said plurality of layers (11, 12, 13, 14, 15, 16, 17), which further comprises at least a spacer layer (13; 23; 33) and a permanent magnetic layer (12) associated to a permanent magnetisation (MP). Said sensor device (20) further comprises a compressible layer (21; 31; 42) and a layer with high magnetic coercivity (22; 32; 42) associated to said plurality of layers (11, 12, 13, 14, 15, 16, 17).
摘要:
A three-dimensional structure in the form of filament (6) for an incandescent lamp comprises a plurality of tungsten microfilaments (6A) having micrometric and/or nanometric dimensions, to form a photonic crystal structure. The microfilaments (6A) are preferably arranged so as to form a series of microcavities in the three-dimensional structure (6), a means having a refraction index different from that of tungsten being present within said microcavities. The described arrangement makes it possible to prevent propagation and spontaneous emission of IR radiation of specific wavelenghts e allows at the same time propagation and spontaneous emission of visible radiation.
摘要:
A sensor device (120) consisting of a temperature sensor deposited onto a spin valve device (10) comprising a plurality of layers arranged as a stack with a layer with low Curie temperature (122) at least 2 spacer layers (121,123) and a permanent magnetic layer (124). The low Curie temperature layer (122) loses its magnetisation when temperature drops below the Curie temperature which leads to an increase of electric resistance in the spin valve device (10).
摘要:
Tire wear monitoring system, including a wearing part (110, 111) to be monitored, said wearing part (110, 111) being associated with magnetic elements (113) and magnetic field sensing means (114), for sensing an intensity of a magnetic field emitted by said magnetic elements (113), associated to said wearing part (113) of said tire. According to the invention, said magnetic field sensing means (114) for sensing an intensity of a magnetic field emitted by said magnetic elements (113) are associated with a wheel to which said tire belongs.
摘要:
A device for detecting magnetic fields, of the type comprising at least one element made of hard magnetic material (12) and an element made of soft magnetic material (13) associated to an element made of semiconductor material (11), means (15) for forcing a current (I) in said semiconductor material (11), characterised in that said element made of hard magnetic material (12) and element made of soft magnetic material (13) are positioned in planar fashion on said element made of semiconductor material (11).
摘要:
An elecroluminescent device (1) comprises: a supporting substrate (2); at least two electrodes (3) positioned on the substrate (2); at least a three-dimensional percolated layer (4), positioned on the substrate (2) between the two electrodes (3), having a metallic mesoporous structure defining a multitude of cavities of micrometric or nanometric dimensions. Present in the cavities of the three-dimensional percolated layer (4) are a multitude of luminescent inclusions (5), which operate to emit light when energized by elections which, as a result of electron tunneling effect, pass through the three-dimensional percolated layer (4).