Self-trapping of magnetic oscillation modes in Landau flux-closure structures -: art. no. 207201

被引：35

作者：

Krasyuk, A ^{[1
]}

Wegelin, F

Nepijko, SA

Elmers, HJ

Schönhense, G

Bolte, M

Schneider, CM

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Phys, D-55128 Mainz, Germany

[2] Univ Hamburg, Inst Angew Phys, D-20355 Hamburg, Germany

[3] Univ Hamburg, Zentrum Mikrostrukturforsch, D-20355 Mainz, Germany

[4] Forschungszentrum Julich GmbH, IFF 6, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.95.207201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigated the magnetodynamics in rectangular Permalloy platelets by means of time-resolved x-ray photoemission microscopy. 10 nm thick platelets of 16x32 mu m size were excited by an oscillatory field along the short side of the sample with a fundamental frequency of 500 MHz and considerable contributions of higher harmonics. Under the influence of the oscillatory field, the Neel wall in the initial classical Landau pattern shifts away from the center, corresponding to an induced magnetic moment perpendicular to the exciting field. This phenomenon is explained by a self-trapping effect of the dominating spin-wave mode when the system is excited just below the resonance frequency. The basic driving mechanism is the maximization of entropy.

引用

页数：4

共 13 条

[1] Vortex core-driven magnetization dynamics [J].

Choe, SB ;

Acremann, Y ;

Scholl, A ;

Bauer, A ;

Doran, A ;

Stöhr, J ;

Padmore, HA .

SCIENCE, 2004, 304 (5669) :420-422

[2] Time-domain excitation of quantized magnetostatic spin-wave modes in patterned NiFe thin film ensembles [J].

Crawford, TM ;

Covington, M ;

Parker, GJ .

PHYSICAL REVIEW B, 2003, 67 (02)

[3] Brillouin light scattering studies of confined spin waves: linear and nonlinear confinement [J].

Demokritov, SO ;

Hillebrands, B ;

Slavin, AN .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2001, 348 (06) :441-489

[4]

Feikes J., 2004, P 2004 EUR PART ACC, P1954

[5]

Landau L. D., 1935, PHYS Z SOWJETUNION, V8, P153, DOI DOI 10.1016/B978-0-08-036364-6.50008-9

[6] Sub-nanosecond resolution x-ray magnetic circular dichroism photoemission electron microscopy of magnetization processes in a permalloy ring [J].

Neeb, D ;

Krasyuk, A ;

Oelsner, A ;

Nepijko, SA ;

Elmers, HJ ;

Kuksov, A ;

Schneider, CM ;

Schönhense, G .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (16) :S1381-S1395

[7] Imaging of spin dynamics in closure domain and vortex structures [J].

Park, JP ;

Eames, P ;

Engebretson, DM ;

Berezovsky, J ;

Crowell, PA .

PHYSICAL REVIEW B, 2003, 67 (02)

[8] Spin-wave eigenmodes of permalloy squares with a closure domain structure [J].

Perzlmaier, K ;

Buess, M ;

Back, CH ;

Demidov, VE ;

Hillebrands, B ;

Demokritov, SO .

PHYSICAL REVIEW LETTERS, 2005, 94 (05)

[9] Quantitative analysis of magnetic excitations in Landau flux-closure structures using synchrotron-radiation microscopy [J].

Raabe, J ;

Quitmann, C ;

Back, CH ;

Nolting, F ;

Johnson, S ;

Buehler, C .

PHYSICAL REVIEW LETTERS, 2005, 94 (21)

[10]

Schafer, 1998, ANAL MICROSTRUCTURES

← 1 2 →