arXiv subjects

K. S. Aleksandrov

Publications and source records attributed to K. S. Aleksandrov.

3 recordsLinked to original sources

arXiv2010

Calculation of thermostable directions and the influence of bias electric field on the propagation of the Lamb and SH waves in langasite single crystal plates

Paper is presented the results of computer simulation. Effect of the dc electric field influence on the propagation of Lamb and SH waves and its temperature coefficients of delay in piezoelectric langasite crystal plate for a lot of cuts and directions have been calculated. There were found the cuts possessing the thermostability and sufficient electromechanical coupling.

cond-mat.other↗

arXiv2010

Anisotropy of DC Electric Field Influence on Acoustic Wave Propagation in Piezoelectric Plate

Anisotropy of dc electric field influence on the different types of acoustic waves in piezoelectric plate has been investigated by means of computer simulation. Detail calculations have made for bismuth germanium oxide crystals.

cond-mat.other↗

arXiv2000

Spin-Glass State in $\rm CuGa_2O_4$

Magnetic susceptibility, magnetization, specific heat and positive muon spin relaxation (\musr) measurements have been used to characterize the magnetic ground-state of the spinel compound $\rm CuGa_2O_4$. We observe a spin-glass transition of the S=1/2 $\rm Cu^{2+}$ spins below $\rm T_f=2.5K$ characterized by a cusp in the susceptibility curve which suppressed when a magnetic field is applied. We show that the magnetization of $\rm CuGa_2O_4$ depends on the magnetic histo Well below $\rm T_f$, the muon signal resembles the dynamical Kubo-Toyabe expression reflecting that the spin freezing process in $\rm CuGa_2O_4$ results Gaussian distribution of the magnetic moments. By means of Monte-Carlo simulati we obtain the relevant exchange integrals between the $\rm Cu^{2+}$ spins in this compound.

cond-mat.str-el↗