1/f noise in mono- and polycrystalline aluminum

Article

关键词: FILMS;    FLUCTUATIONS;    IRRADIATION;    DEFECTS;   

DOI  :  10.1103/PhysRevB.57.53

来源: SCIE

【 摘 要 】

The 1/f noise in three types of aluminum lines has been investigated in the temperature range 140-510 K. The types are one long single crystal, a chain of short single crystals (bamboo), and a polycrystal. In the lines of the first two types the 1/f noise power is significantly lower than in the polycrystalline specimens. The temperature dependence of the noise power in the polycrystalline lines shows a plateau between 370 and 415 K, corresponding to activation energies 0.9-1.0 eV. Both types of monocrystalline lines have equal noise power with a peak around 340 K, corresponding to an activation energy of about 0.8 eV. In the polycrystalline lines the dominant contribution to 1/f noise appears to be the thermally activated motion of atoms in grain boundaries. The measurements on the monocrystalline lines reveal the existence of at least one further contribution to 1/f noise in metals, presumably associated with the thermally activated diffusion of atoms along dislocations.

【 授权许可】

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