Absolute Seebeck coefficient of thin platinum films

Abstract

The influence of size effects on the thermoelectric properties of thin platinum films is investigated and compared to the bulk. Structural properties, like the film thickness and the grain size, are varied. We correlate the electron mean free path with the temperature dependence of the electrical conductivity and the absolute Seebeck coefficient $S_{\text{Pt}}$ of platinum. We use a measurement platform as a standardized method to determine $S_{\text{Pt}}$ and show that $S_{\text{Pt,film}}$ is reduced compared to $S_{\text{Pt,bulk}}$. Boundary and surface scattering reduce the thermodiffusion and the phonon drag contribution to $S_{\text{Pt,film}}$ by nearly the same factor. A detailed discussion and a model to describe the temperature dependence of the absolute Seebeck coefficient and the influence of size effects of electron-phonon and phonon-phonon interaction on $S_{\text{Pt}}$ is given.

References in corpus (3)

• Temperature-Dependent Thermoelectric Properties of Individual Silver Nanowires
• InAs nanowire transistors with multiple, independent wrap-gate segments
• Crystal growth and magnetic properties of equiatomic CeAl

Cited by in corpus (4)

• Thermoelectric response from grain boundaries and lattice distortions in crystalline gold devices
• Thermal effects in spintronic materials and devices: an experimentalist's guide
• Low Temperature Suppression of the Spin Nernst Angle in Pt
• Frustrated Frustration of Arrays with Four-Terminal Nb-Pt-Nb Josephson Junctions