Not just a load of bolometers

Neil Mathur ()
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Neil Mathur: University of Cambridge

Nature, 1997, vol. 390, issue 6657, 229-231

Abstract: The electrical resistance of certain materials changes enormously in a magnetic field. It has been hard to explain the magnitude of this 'colossal magnetoresistance'; but now in one group of materials — the cubic manganese perovskites — a partial explanation may have been found. In the conducting state, there is a sea of electrons, much as there is in a metal; in the high-resistance state, the current-carrying electrons are localized at atomic sites. Current can still flow, but the movement of electrons causes a physical distortion, and it appears to be this distortion that makes the resistance so high.

Date: 1997
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DOI: 10.1038/36728

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