Phonon Heat Conductivity of Garnets Containing Rare Earth Ions

• Authors: B. Bahuguna , C. Painuli , B. Indu
• Languages of publication: EN

Abstracts

EN

The phonon frequency line widths related to the phonon relaxation times is evaluated for impurity, anharmonic and interference scattering processes using double time temperature dependent Green's function method. The effects of force constant changes at impurity site and interference mode (new vibrational mode) on lattice thermal conductivity are the new features of the work. A few comments are made on the additivity of inverse relaxation times. The theory have been utilized to analyse the lattice thermal conductivity of ten synthetic aluminum garnets containing trivalent rare earth ions using Callaway's formula. The calculations show excellent agreements between theory and experiments.

Keywords

EN

63.20.Hp; 63.20.Mt; 66.70.+f

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1991
• Volume: 80
• Issue: 4
• Pages: 527-543

Dates

published

1991-10

received

1991-02-14

Contributors

author

B. Bahuguna

• Crystal Impurity Division, Department of Physics, HNB Garhwal University, Post Box No. 21, Srinagar 246 174, Garhwal, U.P., India

author

C. Painuli

• Crystal Impurity Division, Department of Physics, HNB Garhwal University, Post Box No. 21, Srinagar 246 174, Garhwal, U.P., India

author

B. Indu

• Crystal Impurity Division, Department of Physics, HNB Garhwal University, Post Box No. 21, Srinagar 246 174, Garhwal, U.P., India

Identifiers

DOI

10.12693/APhysPolA.80.527