Thermal Conductivity and Modification The Formula of The Hole(Electron) - Phonon Scattering: Application to Antimony at Low Temperature
Using Callaway’s Model, thermal conductivity o f antimony in the temperature range between (0.4-2. 4)K was calculated. Specialized present study to modif ication the formula of hole(electron)-phonon scatte ring relaxation rate by using phonon wave vector which i s located in the formula of the hole(electron)-phon on relaxation rate, instead of Debye dispersion relati on ( υ ω / = q ). In addition to scattering the phonons by holes(electrons) ,the boundary scattering, point de fects and three-phonon scattering (normal & umklapp) were taken into account to find the total relaxati on rate. Good agreement between theory and experiment is obtained in temperature rang (0.4-2.4)K.
The influences of Co-Cr-Pt-Ta sputtering-target microstructure on C/Co-Cr-Pt-Ta/Cr/glass films were investigated. The sputtering target consisted of a Co solid solution matrix and Ta- and Pt-rich precipitates. Annealing and rolling can increase the Pt and Ta content of the matrix. When the film is made by using an annealed and rolled target, its Hc and S* become large and the Hc distribution becomes small. These changes are related to the film composition. Simple calculations related to the ejection angular distribution of sputtered particles and yields suggest that about compositional changes in films are brought by the differences in the target microstructures.