Theory of nonequilibrium intrinsic spin torque in a single nanomagnet

被引：433

作者：

Manchon, A. ^{[1
]}

Zhang, S. ^{[1
]}

机构：

[1] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 21期

关键词：

magnetisation; nanostructured materials; spin-orbit interactions;

D O I：

10.1103/PhysRevB.78.212405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In a single nanomagnet with spin-orbit interactions, the electrical current can generate a nonequilibrium spin density that gives rise to a spin torque on the magnetization. This spin torque does not involve spin transfer mechanism and originates from the band structure itself. We show that this spin torque can be effectively used to switch the direction of the magnetization and the critical switching current density could be as low as 10(4)-10(6) A/cm(2) for a number of magnetic systems. Several magnetic systems for possible experimental realization are discussed.

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共 29 条

[1] Detection of current-induced spins by ferromagnetic contacts [J].

Adagideli, I. ;

Bauer, G. E. W. ;

Halperin, B. I. .

PHYSICAL REVIEW LETTERS, 2006, 97 (25)

[2] ELECTRONIC-PROPERTIES OF TWO-DIMENSIONAL SYSTEMS [J].

ANDO, T ;

FOWLER, AB ;

STERN, F .

REVIEWS OF MODERN PHYSICS, 1982, 54 (02) :437-672

[3] Giant spin splitting through surface alloying [J].

Ast, Christian R. ;

Henk, Juergen ;

Ernst, Arthur ;

Moreschini, Luca ;

Falub, Mihaela C. ;

Pacile, Daniela ;

Bruno, Patrick ;

Kern, Klaus ;

Grioni, Marco .

PHYSICAL REVIEW LETTERS, 2007, 98 (18)

[4] The Rashba-effect at metallic surfaces [J].

Bihlmayer, G. ;

Koroteev, Yu. M. ;

Echenique, P. M. ;

Chulkov, E. V. ;

Bluegel, S. .

SURFACE SCIENCE, 2006, 600 (18) :3888-3891

[5]

BOVE A, ARXIV08023863

[6] Direct measurement of the spin polarization of the magnetic semiconductor (Ga,Mn)As [J].

Braden, JG ;

Parker, JS ;

Xiong, P ;

Chun, SH ;

Samarth, N .

PHYSICAL REVIEW LETTERS, 2003, 91 (05) :566021-566024

[7] Magnetic effects at the interface between non-magnetic oxides [J].

Brinkman, A. ;

Huijben, M. ;

Van Zalk, M. ;

Huijben, J. ;

Zeitler, U. ;

Maan, J. C. ;

Van der Wiel, W. G. ;

Rijnders, G. ;

Blank, D. H. A. ;

Hilgenkamp, H. .

NATURE MATERIALS, 2007, 6 (07) :493-496

[8] OSCILLATORY EFFECTS AND THE MAGNETIC-SUSCEPTIBILITY OF CARRIERS IN INVERSION-LAYERS [J].

BYCHKOV, YA ;

RASHBA, EI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1984, 17 (33) :6039-6045

[9] Interplay between structural, chemical, and spectroscopic properties of Ag/Au(111) epitaxial ultrathin films: A way to tune the Rashba coupling [J].

Cercellier, H. ;

Didiot, C. ;

Fagot-Revurat, Y. ;

Kierren, B. ;

Moreau, L. ;

Malterre, D. ;

Reinert, F. .

PHYSICAL REVIEW B, 2006, 73 (19)

[10] Tunneling anisotropic magnetoresistance driven by resonant surface states: First-principles calculations on an Fe(001) surface [J].

Chantis, Athanasios N. ;

Belashchenko, Kirill D. ;

Tsymbal, Evgeny Y. ;

van Schilfgaarde, Mark .

PHYSICAL REVIEW LETTERS, 2007, 98 (04)