A gold wire has residual resistivity ratio

PHYSICS · Subjective · Fermi University Physics · Condensed Matter, Materials & Soft Matter · Crystal structure, bonding and diffraction · Electronic transport in solids

Solid State Physics, Ch Point defects, dislocations and alloys

Problem

\mathrm{RRR} = \rho(300\,\mathrm{K})/\rho(4.2\,\mathrm{K}) = 2000

, with

\rho(300\,\mathrm{K}) = 2.2\,\mu\Omega\,\mathrm{cm}

. Assume an increment of

1\,\mu\Omega\,\mathrm{cm}

of residual resistivity per atomic per cent of impurity. Using Matthiessen's rule, calculate the impurity concentration of the wire, in parts per million (atoms).

Browse the problem library