Filtration
of spin-wave signal at transmission of data through a ferromagnetic medium
Yuri Gorobets, Sergey
Reshetnyak & Tat’yana Khomenko.
Physical and Mathematical Faculty of the
"Kyiv Polytechnic Institute" of Kyiv, 03057, Peremohy av., 37,
e-mail: rsa@users.ntu-kpi.kiev.ua
Spin waves are the
super-high-frequency carriers of information in magnetic media. Due to this
property, the devices of spin-wave microelectronics and nanoelectronics
are very perspective for data exchange in magnetic media.
We propose to use the
chip of two homogeneous ferromagnetic media having different parameters of uniaxial magnetic anisotropy, exchange interaction and
saturation magnetization as a high-sensitive filter of spin-wave excitations.
It is possible because of the revealed specific frequency dependence of
reflection coefficient of spin waves, when they fall on the interface of such
media. There is a very narrow region of frequencies, where the reflection coefficient
changes its value practically from zero to one. Moreover, such resonance value
of the frequency can be changed by means of applying external homogeneous
permanent magnetic field. Therefore, the proposed system can carry out the role
of high-sensitive filter at wide diapason of frequencies without change of the
parameters of medium.
We have calculated the
dependencies of spin wave reflection coefficient on frequency and external
magnetic field for ferrogarnet structure in exchange
mode, when the influence of magnetostatic part of
energy is neglected as compared with exchange one. Ferrogarnet
structure is chosen because it has very small damping parameter and provides
high-quality transmission of data.
So, the proposed
system can fulfil the role of high-sensitive wide-range resonance filter of
spin-wave signal at transmission of data in ferromagnetic media.
Session 8. Physical science data.
Poster presentation.