Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: spin-transfer torque

Sortuj według:

Ogranicz wyniki do:

Local existence and uniqueness of regular solutions to a Landau-Lifshitz-Bloch equation with applied current

Ayouch Chahid, Tilioua Mouhcine

Journal of Applied Analysis

2023

Vol. 29, nr 1

113--122

We prove via a Galerkin approximation the time local existence of regular solutions to a Landau-Lifshitz-Bloch equation with applied current in a bounded domain. The uniqueness of the solution is also established. Moreover, we show the global in time existence of a regular solution in dimension two.

Spin torque characteristics for the asymmetric non-collinearly polarized ferromagnetic single-electron devices

Kowalik M

Materials Science Poland

2008

Vol. 26, No. 4

971--975

Spin-transfer torque due to spin polarized current, acting on the magnetic moment of a central electrode (island) of a single-electron ferromagnetic transistor has been theoretically calculated. The magnetic moments of the external electrodes are oriented non-collinearly with respect to the magnetic moment of the island. In an asymmetric situation under consideration, all the electrodes are made of various magnetic materials. The torque is calculated from the spin current absorbed by the island, and electric current flowing through the system is calculated in the sequential transport regime. The asymmetry in tunnelling processes leads to spin accumulation when the spin relaxation time is sufficiently long, which is also taken into account when calculating the spin torque.

Current-induced torque in ferromagnetic single-electron devices in the limits of the fast and slow spin relaxation

Kowalik M., Weymann I., Barnaś J.

Materials Science Poland

2007

Vol. 25, No. 2

453--458

Theoretical analysis of the spin-transfer torque acting on the magnetic moment of the central electrode (island) in a single-electron ferromagnetic transistor has been performed for the spin relaxation time in the island ranging from fast to slow spin relaxation limits. The magnetic configuration of the system can be generally arbitrary. Spin accumulation on the island, due to the spin asymmetry of tunnelling processes, is taken into account. Electric current flowing through the device is calculated in the regime of sequential transport, and the master equation is used to calculate probabilities of different charge and spin states in the island. The torque acting on the central electrode is then calculated from the spin current absorbed by magnetic moment of the island.