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|Title:||Temperature dependence of microwave loss in rochelle salt crystal|
|Authors:||Upadhyay, Trilok Chandra|
|Keywords:||Microwave loss;Rochelle salt crystal;Pseudospin lattice coupled mode;Microwave absorption|
|Abstract:||Considering two-sublattice pseudospin lattice coupled mode model [Chaudhuri et al., J Phys Soc Jpn, 49(1980) 609] along with third-and fourth-order phonon anharmonic interaction terms and using double-time thermal Green's function method, expressions for shift, width, renormalized soft mode frequency, Curie temperature, dielectric constant and microwave absorption have been derived and discussed for rochelle salt crystal. By fitting model values of physical quantities, soft mode frequency, dielectric constant and microwave loss tangent have been calculated. Theoretical results compare well with experimental results of Sandy and Jones, Phys Rev, 168 (1968) 481.|
|Appears in Collections:||IJPAP Vol.47(02) [February 2009]|
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