Its thinness, too, gives it unusual electrical properties.One of these is that if it is placed in a magnetic field it exhibits a phenomenon known as the relativistic quantum Hall effect.
它很薄，这也赋予了它不同寻常的电学性能，如置于磁场中它会表现出相对量子霍尔效应。
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Since a magnetic field changes the resistance of ordinary metals by only a fraction of a percent, they dubbed this phenomenon "giant magnetoresistance," or GMR.
Since a magnetic field changes the resistance of ordinary metals by only a fraction of a percent, they dubbed this phenomenon "giant magnetoresistance, " or GMR.