Resumen
Method and magnetic material to determine manipulation or fraud produced by the application of magnetic fields. The invention consists of composition materials tbx fe100-xy gaand that have properties of magnetic anisotropy that make it possible to use them as a sensor for detection of manipulation of systems sensitive to magnetic fields. The materials present form thin film, which facilitates both its camouflage as its insertion in devices of small size. It is applied to control the manipulation or erasure of magnetically recorded documentation, or modifications in other sensitive systems such as water meters. It does not need to be connected continuously to the electricity grid, which facilitates its placement in different areas as it reduces its maintenance expense. (Machine-translation by Google Translate, not legally binding)