Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superdirectional Beam of Surface Spin Wave   The visualized diffraction patterns of surface spin wave excited by
arbitrarily oriented linear transducer are investigated experimentally in the
plane of tangentially magnetized ferrite film for the case where the transducer
length D is much larger than the wavelength L. It is shown experimentally and
theoretically that the angular width of diffracted surface spin wave beam in
anisotropic ferrite film can take values greater or less than L/D and can also
be zero. For the last case superdirectional (nonexpanding) beam of the surface
spin wave is observed experimentally: the smearing of the beam energy along the
film plane is absent and the length of the beam trajectory is maximal (~50 mm).

20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
19
The categories of this paper are: eess