Low Temperature Physics: 36, 761 (2010); https://doi.org/10.1063/1.3499236 (5 pages)
Физика Низких Температур: Том 36, Выпуск 8-9 (Август 2010), c. 958-963    ( к оглавлению , назад )

Single-magnon tunneling through a ferromagnetic nanochain

E.G. Petrov

N.N. Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine 14-b Metrologichna Str., Kiev 03680, Ukraine
E-mail: epetrov@bitp.kiev.ua

V. Ostrovsky

Department of Physics, Polytechnic Institute of NYU, Brooklyn, New York 11201, USA

Received December 29, 2009


Magnon transmission between ferromagnetic contacts coupled by a linear ferromagnetic chain is studied at the condition when the chain exhibits itself as a tunnel magnon transmitter. It is shown that dependently on magnon energy at the chain, a distant intercontact magnon transmission occurs either in resonant or off-resonant tunneling regime. In the first case, a transmission function depends weakly on the number of chain sites whereas at off-resonant regime the same function manifests an exponential drop with the chain length. Change of direction of external magnetic field in one of ferromagnetic contacts blocks a tunnel transmission of magnon.

PACS: 05.60.Gg Quantum transport;
PACS: 85.75.–d Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integratedmagnetic fields.

Ключевые слова: magnon, nanochain, transmission, tunneling.