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Magnetic field viewing film is used to show stationary or (less often) slowly changing magnetic fields; it shows their location and direction. It is a translucent thin flexible sheet, coated with micro-capsules containing nickel flakes suspended in oil. [ 1 ]
When exposed to a strengthening magnetic field these particles organize into chains that diffract light and cause the solution to change color from a brown to red, yellow, green and then blue. Manufacturers encapsulate microscopic droplets of this solution in a thin plastic film to create a magnetochromic magnetic field viewing screen. [3]
Magnetic viewing film showing a flat refrigerator magnet's magnetization Flat flexible (not hard ceramic ferrite ) refrigerator magnets are created with a Halbach magnetization pattern for a stronger holding force when attached to a flat ferromagnetic surface (e.g. a fridge door) than the holding force from a uniform magnetization.
Magnetic field viewing film; Magnetic gear; Magnetic separation; Magnetic shark repellent; Magnetic slime robot; Magnetic storage; Magnetic switchable device; Magnetic tape; Magnetic Tower of Hanoi; Magnetic water treatment; Magnetic-tape data storage; Magnetoelastic filament; Magnetogram; Magnetograph; Magnetometer; Mass driver; Maxwell coil ...
Magnetic field viewing film – Film used to view the magnetic field of an area Magnetic pistol – a device on torpedoes or naval mines that detect the magnetic field of their target Maxwell coil – a device for producing a large volume of an almost constant magnetic field
When an external magnetic field is projected onto the surface of the thin film, it produces a 2D flux magnetic field imprint pattern, similar to the Faraday's classical iron filings experiment. This pattern includes depth of field information of the external field being displayed by the ferrolens device, despite the thin film having a finite ...
The transfer-matrix method is based on the fact that, according to Maxwell's equations, there are simple continuity conditions for the electric field across boundaries from one medium to the next. If the field is known at the beginning of a layer, the field at the end of the layer can be derived from a simple matrix operation. A stack of layers ...
where n is the number of interfacial spins interactions per unit area, J ex is the exchange constant at the interface, S refers to the spin vector, M refers to the magnetization, t refers to film thickness and H is the external field. The subscript F describes the properties of the ferromagnet and AF to the antiferromagnet.