Abstract: For providing a magnetostrictive film that can exhibit high magnetostrictive properties in the vicinity of zero magnetic field and their manufacturing methods, a magnetostrictive film thermal sprayed on an object under test includes a metallic glass film subjected to thermal processing at a temperature lower than the glass transition temperature and not lower than the Curie point, and shows a linearity between the magnetic field and the magnetostriction in at least a part of the magnetic field from ?15 kA/m to +15 kA/m (both inclusive).

Abstract: The present invention provides a process for producing a sprayed coating which contains ?-Fe nanocrystals dispersed therein. This process includes a thermal spraying step for subjecting an alloy powder which consists of an amorphous phase having a nano-hetero structure such that ?-Fe nanocrystals having particle diameter of 0.3 nm or more and a mean particle diameter of less than 10 nm are dispersed and which has a first crystallization temperature (Tx1) and a second crystallization temperature (Tx2) and further has an Fe content of 74 at % or more to collision with the surface of a substrate by a thermal spray method using a plasma jet or a combustion flame, and forms an amorphous sprayed coating which contains ?-Fe nanocrystals having particle diameters of 0.3 nm or more and a mean particle diameter of 30 nm or less dispersed therein.

Abstract: For providing a magnetostrictive film that can exhibit high magnetostrictive properties in the vicinity of zero magnetic field and their manufacturing methods, a magnetostrictive film thermal sprayed on an object under test includes a metallic glass film subjected to thermal processing at a temperature lower than the glass transition temperature and not lower than the Curie point, and shows a linearity between the magnetic field and the magnetostriction in at least a part of the magnetic field from ?15 kA/m to +15 kA/m (both inclusive).

Abstract: A joy stick mechanism for an ophthalmic apparatus moving an optical device of the ophthalmic apparatus horizontally and vertically, which mechanism is simple in structure but excellent in operational efficiency. Therefore, this mechanism comprises a drive device for moving the optical device vertically, a rotating knob rotatably provided on a shaft which substantially extends through a central portion of the mechanism, a detection device for detecting a direction and an amount of rotation of the rotating knob, and a control device for controlling the drive device on the basis of detection results of the detection device.