Control of domain wall thickness by spatial modulation of uniaxial anisotropy and exchange stiffness parameters

被引：1

作者：

Arai, Hiroko ^{[1
,2
]}

Imamura, Hiroshi ^{[2
]}

机构：

[1] JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

[2] Natl Inst Adv Ind Sci & Technol, Spintron Res Ctr, Tsukuba, Ibaraki 3058568, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2015年 / 54卷 / 03期

关键词：

Stiffness - Equations of motion - Anisotropy;

D O I：

10.7567/JJAP.54.030307

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of spatial modulation of the uniaxial anisotropy (K) and exchange stiffness (A) parameters on the domain wall thickness was theoretically studied. We derived the Euler-Lagrange equation and the Landau-Lifshitz-Gilbert equation considering the modulation of K and A, and showed that the modulation of A gives rise to an additional term consisting of the first derivatives of A and the magnetization unit vector. Owing to this term, the modulation of A is more effective to modify the domain wall thickness than K. The condition for domain wall pinning by controlling its thickness through the modulation of K and A was also obtained. (C) 2015 The Japan Society of Applied Physics

引用

页数：4

共 24 条

[1] Spin-wave excitations induced by spin current through a magnetic point contact with a confined domain wall [J].

Arai, Hiroko ;

Tsukahara, Hiroshi ;

Imamura, Hiroshi .

APPLIED PHYSICS LETTERS, 2012, 101 (09)

[2] Tunable steady-state domain wall oscillator with perpendicular magnetic anisotropy [J].

Bisig, A. ;

Heyne, L. ;

Boulle, O. ;

Klaeui, M. .

APPLIED PHYSICS LETTERS, 2009, 95 (16)

[3] Macroscopic quantum tunneling of ferromagnetic domain walls [J].

Braun, HB ;

Kyriakidis, J ;

Loss, D .

PHYSICAL REVIEW B, 1997, 56 (13) :8129-8137

[4] Controlled domain wall pinning in nanowires with perpendicular magnetic anisotropy by localized fringing fields [J].

Breitkreutz, Stephan ;

Eichwald, Irina ;

Kiermaier, Josef ;

Hiblot, Gaspard ;

Csaba, Gyorgy ;

Porod, Wolfgang ;

Schmitt-Landsiedel, Doris ;

Becherer, Markus .

JOURNAL OF APPLIED PHYSICS, 2014, 115 (17)

[5]

Brown W. F., 1978, MICROMAGNETICS

[6] Current induced localized domain wall oscillators in NiFe/Cu/NiFe submicron wires [J].

Chang, L. J. ;

Lin, Pang ;

Lee, S. F. .

APPLIED PHYSICS LETTERS, 2012, 101 (24)

[7] THE PINNING FORCE BETWEEN A BLOCH WALL AND A PLANAR PINNING SITE IN MNALC [J].

CHEN, XH ;

GAUNT, P .

JOURNAL OF APPLIED PHYSICS, 1990, 67 (05) :2540-2543

[8] Spin-transfer-induced microwave oscillations in spin valves with ferromagnetic nano-contacts in oxide spacer layer [J].

Doi, Masaaki ;

Endo, Hiroaki ;

Shirafuji, Kazushige ;

Kawasaki, Shohei ;

Sahashi, Masashi ;

Fuke, Hiromi Niu ;

Iwasaki, Hitoshi ;

Imamura, Hiroshi .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2011, 44 (09)

[9] Current driven dynamics of domain walls constrained in ferromagnetic nanopillars [J].

Franchin, Matteo ;

Fischbacher, Thomas ;

Bordignon, Giuliano ;

de Groot, Peter ;

Fangohr, Hans .

PHYSICAL REVIEW B, 2008, 78 (05)

[10] Tunable Resistivity of Individual Magnetic Domain Walls [J].

Franken, J. H. ;

Hoeijmakers, M. ;

Swagten, H. J. M. ;

Koopmans, B. .

PHYSICAL REVIEW LETTERS, 2012, 108 (03)

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