Nanoparticle News, December 1st, 2005
The small size and low power of GMR sensors allow them to be fabricated into on-chip arrays of sensors to detect very small magnetic fields with very high spatial resolution. Previously, solid-state magnetic sensors such as Hall-effect and Anisotropic Magnetoresisitive (AMR) sensors were not suitable in these applications either due to size, power or sensitivity issues. With the advent of the more sensitive Giant Magnetoresistive (GMR) and Spin-Dependent Tunneling (SDT) sensors,
it has become possible to manufacture such arrays. These devices can be used to measure very small magnetic field...
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