Magnetic spatial non-uniformities on the picosecond timescale

被引：9

作者：

Acremann, Y

Kashuba, A

Buess, M

Pescia, D

Back, CH

机构：

[1] ETH Zurich, Festkorperphys Lab, ETH Honggerberg, CH-8093 Zurich, Switzerland

[2] LD Landau Theoret Phys Inst, Chernogolovka 142432, Russia

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 239卷 / 1-3期

关键词：

ferromagnetic resonance; scanning kerr microscope;

D O I：

10.1016/S0304-8853(01)00572-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetization of a Co disk with an in-plane flux-closure domain structure was subject to a picosecond magnetic field pulse perpendicular to the plane. Images with sub-micron spatial resolution have been recorded every 10 ps which reveal magnetic non-uniformities of the ferromagnetic resonance (FMR) response. A detailed analysis of the images shows a difference in the FMR frequencies of about 10% as a function of radius, In addition, the magnetization at the edge responds earlier to the applied field pulse. We discuss possible origins of these phenomena. (C) 2002 Elsevier Science B.V. All rights reserved.

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收藏

页码：346 / 350

页数：5

相关论文

共 21 条

[1] Imaging precessional motion of the magnetization vector [J].

Acremann, Y ;

Back, CH ;

Buess, M ;

Portmann, O ;

Vaterlaus, A ;

Pescia, D ;

Melchior, H .

SCIENCE, 2000, 290 (5491) :492-495

[2]

ACREMANN Y, IN PRESS

[3] Minimum field strength in precessional magnetization reversal [J].

Back, CH ;

Allenspach, R ;

Weber, W ;

Parkin, SSP ;

Weller, D ;

Garwin, EL ;

Siegmann, HC .

SCIENCE, 1999, 285 (5429) :864-867

[4] Ultrafast microscopy and numerical simulation study of magnetization reversal dynamics in permalloy [J].

Ballentine, GE ;

Hiebert, WK ;

Stankiewicz, A ;

Freeman, MR .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :6830-6832

[5] Suppression of magnetic-field pulse-induced magnetization precession by pulse tailoring [J].

Bauer, M ;

Lopusnik, R ;

Fassbender, J ;

Hillebrands, B .

APPLIED PHYSICS LETTERS, 2000, 76 (19) :2758-2760

[6] Ultrafast magnetization reversal dynamics investigated by time domain imaging [J].

Choi, BC ;

Belov, M ;

Hiebert, WK ;

Ballentine, GE ;

Freeman, MR .

PHYSICAL REVIEW LETTERS, 2001, 86 (04) :728-731

[7] Coherent control of precessional dynamics in thin film permalloy [J].

Crawford, TM ;

Kabos, P ;

Silva, TJ .

APPLIED PHYSICS LETTERS, 2000, 76 (15) :2113-2115

[8] Subnanosecond magnetization dynamics measured by the second-harmonic magneto-optic Kerr effect [J].

Crawford, TM ;

Silva, TJ ;

Teplin, CW ;

Rogers, CT .

APPLIED PHYSICS LETTERS, 1999, 74 (22) :3386-3388

[9] Direct measurement of the conduction electron spin-lattice relaxation time T-1 in gold [J].

Elezzabi, AY ;

Freeman, MR ;

Johnson, M .

PHYSICAL REVIEW LETTERS, 1996, 77 (15) :3220-3223

[10] Time-resolved scanning Kerr microscopy of ferromagnetic structures (invited) [J].

Freeman, MR ;

Hiebert, WK ;

Stankiewicz, A .

JOURNAL OF APPLIED PHYSICS, 1998, 83 (11) :6217-6222