Explain the phenomenon Giant Magnetoresistance (GR) Give example of the

Giant Magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in thin film structures composed of alternating ferromagnetic and non-magnetic conductive layers. The electrical resistance of such structures changes significantly depending on the relative alignment of magnetizations in the ferromagnetic layers, which can be manipulated by an external magnetic ________ ___ __________ ____ _______ ____.
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