Nanostructured magnetic sensors

Abstract

The world of sensors is characterized by a large variety of devices, appropriately selected to answer the needs to detect different external conditions. For instance, multitudes of thermal sensors are present as contact and non-contact sensors, devices based on the measure of heat flux or temperature changes, and basic sensing technologies for temperature probes include thermocouple [1], thermistor [2], solid state [3] and fibre optic [4]. Magnetic sensors are equally variegated in their types and shapes according to the different physical principles they make use of: from those that are actuated by the presence of a permanent magnet, where their operating principle is based on the use of reed contacts, to fluxometric sensors which use the voltage induced by the changes in permeability of a ferromagnetic core. © 2009 Springer-Verlag US.