Ultrasonic attenuation study of erbium in a magnetic field |
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Authors: | R. Treder M. Tachiki M. Levy |
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Affiliation: | Physics Department, University of Wisconsin-Milwaukee, Milwaukee, WI, 53201, USA |
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Abstract: | The ultrasonic attenuation coefficient of longitudinal waves propagating along the c-axis of a single crystal of erbium was measured over a temperature range which covers the transition temperature from the paramagnetic to the sinusiodal phase T6 = 83.8 K and the transition temperature from the sinusoidal to elliptical phase T⊥ = 53.9 K. These measurements were performed as a function of temperature in the presence of constant magnetic fields and at constant temperatures as a function of applied magnetic fields. A magnetic field parallel to the c-axis shifted T6 to lower temperatures and reduced the peak attenuation. A broad new maximum emerged on the high temperature side of the field-shifted T6. Application of H perpendicular to the c-axis produced little change in either T6 or T⊥. A model introduced by Tachiki and Mackawa is used to discuss the results. |
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