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\begin{document}
\title{Spin-wave peculiarities of acoustics of semi-infinite ferromagnet (antiferromagnet) in static external magnetic field}
\author{\underline{O. Prikhodko}}
\affiliation{Donetsk Institute for Physics and Engineering of the National Academy of Sciences of Ukraine, 83114, Donetsk, Ukraine}
\author{O. Sukhorukova}
\affiliation{Donetsk Institute for Physics and Engineering of the National Academy of Sciences of Ukraine, 83114, Donetsk, Ukraine}
\author{S. Tarasenko}
\affiliation{Donetsk Institute for Physics and Engineering of the National Academy of Sciences of Ukraine, 83114, Donetsk, Ukraine}
\author{V. Shavrov}
\affiliation{Kotel’nikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, 125009, Moscow, Russia}
\begin{abstract}
The study of the necessary conditions for localization of elastic wave   near the boundary of magnetic and nonmagnetic mediums  under external magnetic field plays  important  value for designing  of the tunable magnetic phononic crystal.  Our investigation shows that a traditional approach to the calculation of a Parekh wave [1] only on the base  of magnetoelastic and magnetodipole interaction  inadequately describes the spectrum of the surface elastic  wave in the high-frequency range.  It is determined that the magnetostriction plays  an important role  for high-frequency surface magnetoelastic dynamic of ferromagnet or antiferromagnet. The necessary conditions for existence of the "new" Parekh wave and for  amplification of evanescent SH wave and leaky Parekh wave are derived

\textbf{References:}
\begin{spacing}{0.8}

{\scriptsize[1] 1.J.P.Parekh, Electron.Lett 6, 322 (1969) }
\end{spacing}

\end{abstract}
\maketitle

\end{document}
