1/f resistance fluctuation of a carbon fiber

1/f resistance fluctuations of carbon fiber are measured under the conditio n that tension of the carbon fiber is changed. The deformation of the fiber extends from an elastic region to a plastic one. It is found that the inte nsity of 1/f resistance fluctuations increases significantly as the applied tension increases, while the change of the mean value of the resistance is very small. The increase of the 1/f intensity is considered to originate f rom the change of the nonlinear potential caused by the applied tension.