Nonlinear acoustic transparency phenomena in strained paramagnetic crystals
Journal Article
·
· Journal of Experimental and Theoretical Physics
Nonlinear dynamics of longitudinal acoustic pulses propagating in a strained paramagnetic cubic crystal at low temperature is analyzed. The direction of constant uniform strain is parallel to one of the fourth-order symmetry axes. Effective-spin 1 ions are considered as paramagnetic impurities with the strongest spin-lattice interaction. In this medium, normally degenerate magnetic sublevels are dynamically shifted by the quadrupole Stark effect, and the frequencies of the transitions induced by an acoustic pulse change accordingly. The self-consistent system of equations derived in this study without using the slowly varying envelope approximation describes pulse propagation at an arbitrary angle to the direction of the static strain. Exponentially and rationally decaying monopolar and breather-like solutions to the system are obtained. An analysis of the solutions reveals an asymmetry of the pulse polarity depending on the type of strain (extension or compression) and the pulse propagation direction. In particular, it is shown that acoustic transparency associated with monopolar strain pulses exhibits threshold behavior. The sign of the time area (zeroth harmonic) of breather-like strain pulses is such that the transition frequency averaged over an oscillation period dynamically decreases. This behavior determines the efficiency of generation of high-order harmonics of acoustic pulses in strained paramagnetic crystals.
- OSTI ID:
- 21067692
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 5 Vol. 102; ISSN JTPHES; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
Similar Records
Acoustic self-induced transparency for transverse waves in a system with resonant and quasi-resonant transitions
On the propagation of hypersonic solitons in a strained paramagnetic crystal
Self-induced acoustic transparency of three-component longitudinal-transverse pulses
Journal Article
·
Wed Jul 15 00:00:00 EDT 2009
· Journal of Experimental and Theoretical Physics
·
OSTI ID:21443706
On the propagation of hypersonic solitons in a strained paramagnetic crystal
Journal Article
·
Thu Nov 14 23:00:00 EST 2013
· Journal of Experimental and Theoretical Physics
·
OSTI ID:22309121
Self-induced acoustic transparency of three-component longitudinal-transverse pulses
Journal Article
·
Sun Apr 15 00:00:00 EDT 2012
· Journal of Experimental and Theoretical Physics
·
OSTI ID:22027885