Adiabatic and nonadiabatic spin-transfer torques in the current-driven magnetic domain wall motion / Kishine Jun-ichiro,Ovchinnikov A. S. // PHYSICAL REVIEW B. - 2010. - V. 81, l. 13.

ISSN/EISSN:

1098-0121 / нет данных

Type:

Article

Abstract:

A consistent theory to describe the correlated dynamics of quantum-mechanical itinerant spins and semi-classical local magnetization is given. We consider the itinerant spins as quantum-mechanical operators, whereas local moments are considered within classical Lagrangian formalism. By appropriately treating fluctuation space spanned by basis functions, including a zero-mode wave function, we construct coupled equations of motion for the collective coordinate of the center-of-mass motion and the localized zero-mode coordinate perpendicular to the domain wall plane. By solving them, we demonstrate that the correlated dynamics is understood through a hierarchy of two time scales: Boltzmann relaxation time tau(el), when a nonadiabatic part of the spin-transfer torque appears, and Gilbert damping time tau(DW), when adiabatic part comes up.

Author keywords:

FERROMAGNETS; EXCITATION; DYNAMICS; EQUATION

DOI:

10.1103/PhysRevB.81.134405

Web of Science ID:

ISI:000277207900040

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	APR 1
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	134405
Keywords-Plus	FERROMAGNETS; EXCITATION; DYNAMICS; EQUATION
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Kishine, Jun-ichiro/C-1743-2015 Ovchinnikov, Alexander/B-9906-2009
ORCID-Numbers	Kishine, Jun-ichiro/0000-0001-6162-7067 Ovchinnikov, Alexander/0000-0002-1173-9260
Funding-Acknowledgement	Ministry of Education, Culture, Sports, Science and Technology, Japan {[}19540371]
Funding-Text	J. K. acknowledges Grant-in-Aid for Scientific Research (C) (Grant No. 19540371) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
Number-of-Cited-References	31
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	10
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	590ES