Abstract
Effect of an external magnetic field ( H) on the sound attenuation coefficient ( α) in a spin-1 Ising system containing biquadratic interaction is investigated using the lowest approximation of the cluster variation method and the Onsager theory. Field variation of the attenuation coefficient has been studied for different values of frequency and temperature. It is found that a quadratic field dependence of α on H appears in the low-field region while it reaches to a maximum at a certain magnetic field and decreases as the field increases in the high-field region. A qualitative comparison between these results and the results of ultrasonic studies in the rare-earth metals, heavy fermion superconductors, and inorganic spin-Pearls compounds is presented. Good agreement is achieved.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
