Ultrasonic Attenuation near the Magnetic Critical Point
Kensuke Tani,Hazime Mori +1 more
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Theoretical results on attenuation of longitudinal sound in ferro- and antiferromagnets near the critical points are reported in this article, and recent experiments in MnF 2 are discussed.Abstract:
Theoretical results on the attenuation of longitudinal sound in ferro- and antiferromagnets near the critical points are reported, and recent experiments in MnF 2 are discussed.read more
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The study of structural phase transitions by means of ultrasonic experiments
TL;DR: In this paper, the effects of various processes occurring at a structural phase transformation on the quantities measured in an ultrasonic experiment are discussed and various theoretical approaches are discussed as well as experimental results.
Journal ArticleDOI
Sound propagation near magnetic phase transitions
B. Lüthi,T.J. Moran,R.J. Pollina +2 more
TL;DR: Experimental results on critical velocity and critical attenuation changes are presented and discussed in this article, where the critical velocity changes show a uniform behavior for all substances studied, namely a frequency independent and a weak temperature dependent effect.
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Effect of distance-dependent exchange interactions in MnO on elastic constants and magnetic susceptibility
TL;DR: In this article, an ultrasonic measurement was performed on antiferromagnetic MnO for longitudinal and transverse waves propagating along the [100], [110] and [111] directions, from 77 up to 350 K.
Journal ArticleDOI
A note on the ultrasonic attenuation near the magnetic critical points
TL;DR: In this paper, the effects of spin-lattice relaxation and spin thermal conduction on ultrasonic attenuation were investigated, and the effect of spin lattice relaxation on attenuation was investigated.
Journal ArticleDOI
A phenomenological theory of ultrasonic attenuation in ferroelectrics
TL;DR: In this article, the complex damping constant of an ultrasonic wave in a ferroelectric crystal which is non-piezoelectric above the Curie temperature was calculated in the hydrodynamic approximation.