Abstract: A cellular tissue magnetic signal detecting device for detecting a magnetic signal locally generated in a cellular tissue including an excitable cell generating an electrical excitation, the cellular tissue magnetic signal detecting device includes: a magnetic sensor head operative to approach the cellular tissue within 1000 ?m; and a magnetic detecting section detecting the magnetic signal with a resolution of 1000 ?m or less at a noise level of 1 nT or less, and a response speed of 1 ms or less based on an output signal from the magnetic sensor head; the magnetic sensor head including magneto impedance sensor.

Abstract: Here is disclosed a MI element made of thin film magnetic material utilizing a magnetic impedance effect comprising a substrate, first and second magnetic materials successively laminated on a surface of the substrate each in the form of thin film wherein the first magnetic material has its axis of easy magnetization Jm1 declined at an angle of &agr;° and the second magnetic material has its axis of easy magnetization Jm2 declined at an angle of −&agr;° with respect to a reference line Oo which is a direction corresponding to a path of high frequency current Iac so that the axes of easy magnetization of the first and second magnetic materials may intersect each other. Such MI element made of thin film magnetic material obtains linear magnetic field sensor characteristics exhibiting a remarkably large variation of impedance in response to a relatively low external magnetic field without any demand for bias magnetic field.

Abstract: A magnetic field detection device that detects two components of an external magnetic field. The device uses the magneto-impedance effect in ferromagnetic amorphous wire. A detection coil wrapped around the amorphous wire detects the magnetic flux change of the amorphous wire, which is proportional to the external magnetic field. The sensitivity of the device is increased due to circuitry that extracts the initial output pulse. It is also increased with the use of negative feedback and with the comparison of differential outputs. The two sets of detection elements are placed orthogonally for greatest sensitivity. Resin molding is employed for easy handling. This detection device can be used as part of a compass.

Abstract: A production method for making a strong connection between an amorphous wire and a terminal. The amorphous wire is placed between the terminal and a bonding metal of aluminum or aluminum alloy, with the bonding metal in contact with both the amorphous metal and the terminal. Then, ultrasonic vibration is applied through the bonding metal to make the connection between the bonding metal and the terminal.

Abstract: A superconducting reversible variable inductor of this invention comprises: a core made of a Type II superconductor having a reversible magnetic permeability variation range in which the magnetic permeability varies reversibly with respect to a variation of a magnetic field of a predetermined strength or less and falling in the range of from a lower critical magnetic field or more to an upper critical magnetic field or less; and one or more coils wound around the core. The superconductor reversible variable inductor has good linear controllability and high speed response of the inductance.