Elastic constants of borocarbides. New approach to acoustic measurement technique

Abstract

A new version of the phase method of determining the sound velocity is 55proposed and implemented. It utilizes the "Nonius" measurement technique and can give acceptable accuracy (≤ 1%) in samples of submillimeter size. Measurements of the sound velocity are made in single-crystal samples of the borocarbides RNi2B2C (R = Y, Lu, Ho). The elastic constants and the Debye temperature are calculated.

Magnetic phase transitions in the NdFe3(BO3)4 multiferroic

“…The mesurements of the relative changes of the velocity and attenuation of acoustic modes were performed using the automatized setup described in [12]. The working frequency was 54.3 MHz.…”

Electronic structure, bulk and magnetic properties of MB6 and MB12 borides

“…The sound velocity measurements in borides were performed at T = 78 K along the principal crystallographic axes by employing the phase-frequency method (see Ref. [10] for details). The evaluated elastic constants and bulk moduli of the borides are given in Table 1.…”

Magnetoelastic properties of Nd0.9Dy0.1Fe3(BO3)4 ferroborate

“…9 The accuracy of these measurements for $0.5-mm-thick samples was on the order of 10 À4 for the speed and $0.05 dB for the damping. The behavior of the speed and absorption of transverse acoustic modes was studied as a function of temperature over the range 1.7-120 K and of magnetic field up to 50 kOe.…”