Magnetoresistance is a phenomenon in which the electrical resistance of a material changes in the presence of a magnetic field. This effect can be observed in various types of materials, including metals, semiconductors, and insulating materials. ### Key Points about Magnetoresistance: 1. **Basic Principle**: The electrical resistance of materials typically depends on their physical and chemical properties, but when a magnetic field is applied, the movement of charge carriers (such as electrons) within the material can be affected.
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