Dynamics of current induced magnetic superstructures in exchange-spring devices

Магнетизм

Автор(и)

  • A.M. Kadigrobov Department of Physics, University of Gothenburg, SE-412 96 Gothenburg, Sweden
  • R.I. Shekhter Theoretische Physik III, Ruhr-Universität Bochum, D-44801 Bochum, Germany
  • M. Jonson Department of Physics, University of Gothenburg, SE-412 96 Gothenburg, Sweden

DOI:

https://doi.org/10.1063/1.4732128

Ключові слова:

magnetic superstructures, soliton, magnetothermionic oscillations.

Анотація

Thermoelectric manipulation of the magnetization of a magnetic layered stack in which a low-Curie temperature magnet is sandwiched between two strong magnets (exchange spring device) is considered. Controllable Joule heating produced by a current flowing in the plane of the magnetic stack (CIP configuration) induces a spatial magnetic and thermal structure along the current flow — a magnetothermal-electric domain (soliton). We show that such a structure can experience oscillatory in time dynamics if the magnetic stack is incorporated into an electric circuit in series with an inductor. The excitation of these magnetothermionic oscillations follow the scenario either of “soft” of “hard” instability: in the latter case oscillations arise if the initial perturbation is large enough. The frequency of the temporal oscillations is of the order of 105–107 s–1 for current densities j ~ 106–107 A/cm2.

Завантаження

Дані завантаження ще не доступні.

Downloads

Опубліковано

2012-05-23

Як цитувати

(1)
Kadigrobov, A.; Shekhter, R.; Jonson, M. Dynamics of Current Induced Magnetic Superstructures in Exchange-Spring Devices: Магнетизм. Fiz. Nizk. Temp. 2012, 38, 793-800.

Номер

Розділ

Статті

Статті цього автора (авторів), які найбільше читають

1 2 3 4 5 > >>