The resistance of a GMR sample changes in the presence of a magnetic
field created by a magnetic stir bar.
What is the orientation of this GMR sensor? The LED lights when the
sensor detects a magnetic field.
A GMR sensor responds to a changing magnetic field. The LED lights when
the sensor detects a magnetic field.
What is the pattern of the magnetic field on a refrigerator magnet? The
LED lights when the sensor detects a magnetic field.
An electromagnet produces a stronger field with an iron core. The LED
lights when the sensor detects a magnetic field.
Animation of current flow through a GMR material. Electron passage is
impeded by electrons of opposite spin. Larger movie in a new window
Model of electron spin alignment in a GMR material. The alignment changes
upon application of a magnetic field.
Model of electron spin alignment in a GMR material. The alignment changes
upon application of a magnetic field. When the spins align the laser beam coming from the left can pass through.
