 Colossal magnetoresistance

Colossal magnetoresistance (CMR) refers to a significant change in the electrical resistance of a material in response to an applied magnetic field. This phenomenon is especially pronounced in certain types of manganese oxides, such as perovskite materials. CMR can be defined as an increase in resistance by several orders of magnitude when a magnetic field is applied, compared to the resistance observed in the absence of a magnetic field.