摘要:
A superconductive magneto-resistive device includes superconductive ceramic films having a magneto-resistive effect. In the superconductive magneto-resistive device, the superconductive ceramic films are laminated one by one, and the adjacent superconductive ceramic films are insulated by each electrical insulation film, respectively, except for one portion of each of the adjacent superconductive ceramic films, resulting in that the superconductive ceramic films are connected in series. Furthermore, a pair of electrodes is arranged on the upper-most and lower-most superconductive ceramic films.
摘要:
A ceramic superconductive magneto-resistive element which has weak grain boundaries is highly sensitive to weak magnetic fields. The magnetic field is measured by the use of an electronic circuit. A comparator is used for comparing an output and reference voltage of the element. When there is a difference between the output and reference voltage bias current is used to equalize these voltages.
摘要:
A superconductinve magneto-resistive device for use in a sensor system for sensing an external magnetic field which is formed so as to have a predetermined pattern for a current path through which a supplied current flows. The pattern includes portions formed close and parallel to each other so that magnetic fields induced by respective currents flowing through the portions can be cancelled with each other.
摘要:
A magnetic image detection device which measures a magnetic image in the first or second dimension by using a superconducting body. In the magnetic image detection device, multiple band-shaped superconducting bodies are provided in parallel on a nonmagnetic dielectric substrate, and electrodes are provided on both ends of the superconducting bodies so as to form pairs. A detection circuit detects resistance between the electrodes on both ends of the multiple superconducting bodies according to intensity of external magnetic field.
摘要:
A superconductive magnetoresistor has a substrate, a ceramic superconductive film which is formed on one face of the substrate, ferromagnetic elements for focusing an external magnetic field, and an insulating film. One of the ferromagnetic elements is integrally combined with the other face of the substrate. The other of the ferromagnetic elements is combined with the ceramic superconductive film thorough the insulating film.
摘要:
An apparatus of sensing a magnetic field using a ceramic superconductor magneto-resistive element having a superconductor magneto resistive effect of non linear characteristic against the applied magnetic field, there is provided a coil for applying a bias magnetic field to the magneto-resistive element, the coil is connected to a feed back power source for supplying current for holding the output of the magneto-resistive element constant value, whereby the applied magnetic field is measured by the current supplied to the coil.There is disclosed also a device for sensing a magnetic field using a magneto-resistive element comprising a superconductor member having weak coupling grain boundaries, said device comprising means for applying A.C. bias magnetic field to said element, and means for taking out an output voltage of the element generated by application of the bias magnetic field as the signal representing the intensity of the applied magnetic field.
摘要:
An apparatus for magnetic measurement using superconductive magneto-resistive film which is disposed in a magnetic field with the surface of the superconductive magneto-resistive film directed in parallel with the direction of the magnetic field so that the magnetic hysterisis property of the film can be avoided and the accuracy of the measurement can be much improved.
摘要:
The invention relates to an apparatus and method to detect a magnetic field by measuring the magnetically modulated resistance of a superconductor maintained at its phase transition temperature (T.sub.c).
摘要:
A superconductive magneto-resistive device is made up of superconductive materials having grain boundaries which act as weak couplings. The superconductive material will change from the superconductive state to the normal state when a magnetic field is applied to the material. The superconductive material can be used in various devices for measuring.
摘要:
A method for sensing an applied magnetic field uses a superconductor element with superconductive material as a sensor. The element is cooled to its superconducting state and current is supplied to the element. An applied magnetic field is applied to the superconducting material and an output from the superconductor element is fed to a feed back power source. In the feedback power source a comparison is made between an input voltage from the superconductive element and a reference voltage. Current is applied to a coil for applying a bias magnetic field to the superconductor element based on the comparison. With this method, the input voltage and the reference voltage are made as equal as possible. A superconductive device includes a coil for applying an AC power source and a coil for applying a DC power source. The DC power source can be set at various values and the application of the DC power source, which is a bias voltage, changes the output of the superconductive element by changing the electrical wave form outputted from the superconductive element.