Ultrasonic Attenuation at the Magnetic-Phase Transition in Gadolinium
- 1 February 1968
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 39 (2) , 718-719
- https://doi.org/10.1063/1.2163598
Abstract
We present ultrasonic attenuation measurements in the vicinity of the Curie temperature. Longitudinal waves along the c axis exhibit a large critical attenuation, whereas transverse waves show only a spurious attenuation peak. Along the a axis the critical attenuation for longitudinal waves is much smaller. In a nonsymmetry direction both longitudinal and transverse waves show large critical attenuation. AH these results can be explained, assuming the spin-phonon coupling is of the volume magnetostrictive type. For longitudinal waves propagating either along the c or a axis we find the following attenuation law for (T − TC)/TC > 1×10−3 α ∝ ω2(T − TC)−1.2.This publication has 2 references indexed in Scilit:
- Saturation Magnetostriction Constants of GadoliniumJournal of Applied Physics, 1964
- Ultrasonic Attenuation in MnNear the Néel TemperaturePhysical Review Letters, 1963