Layer-resolved study of magnetic interaction effects in heterostructure dot arrays

被引：12

作者：

Choi, Y

Lee, DR

Freeland, JW

Srajer, G

Metlushko, V

机构：

[1] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[2] Pohang Univ Sci & Technol, Accelerator Lab, Pohang 790784, South Korea

[3] Univ Illinois, Dept Elect & Comp Engn, Chicago, IL 60607 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2179116

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using polarized x rays we have studied magnetic interactions in a series of patterned single-layer (NiFe and Co) and multilayer (NiFe/Co and NiFe/Cu/Co) heterostructures. Extraction of layer-specific magnetic hysteresis loops from an array of 1-mu m dots allows us to separate the influence of inter- and intralayer interactions. Double layer (NiFe/Co) dots show evidence of identical vortex formation in both layers while with the spacer layer the direct coupling between the two magnetic layers is removed, and dipolar field contribution becomes significant so that the vortex formation in both layers is suppressed. (c) 2006 American Institute of Physics.

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页数：3

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共 21 条

[1] NOVEL MAGNETORESISTANCE EFFECT IN LAYERED MAGNETIC-STRUCTURES - THEORY AND EXPERIMENT [J].

BARNAS, J ;

FUSS, A ;

CAMLEY, RE ;

GRUNBERG, P ;

ZINN, W .

PHYSICAL REVIEW B, 1990, 42 (13) :8110-8120

[2] Element-selective nanosecond magnetization dynamics in magnetic heterostructures [J].

Bonfim, M ;

Ghiringhelli, G ;

Montaigne, F ;

Pizzini, S ;

Brookes, NB ;

Petroff, F ;

Vogel, J ;

Camarero, J ;

Fontaine, A .

PHYSICAL REVIEW LETTERS, 2001, 86 (16) :3646-3649

[3] Single-domain circular nanomagnets [J].

Cowburn, RP ;

Koltsov, DK ;

Adeyeye, AO ;

Welland, ME ;

Tricker, DM .

PHYSICAL REVIEW LETTERS, 1999, 83 (05) :1042-1045

[4] Magnetic tunneling applied to memory [J].

Daughton, JM .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :3758-3763

[5] Size dependence of switching thresholds for pseudo spin valve MRAM cells [J].

Everitt, BA ;

Pohm, AV ;

Daughton, JM .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :4020-4022

[6] A unique polarized x-ray facility at the Advanced Photon Source [J].

Freeland, JW ;

Lang, JC ;

Srajer, G ;

Winarski, R ;

Shu, D ;

Mills, DM .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2002, 73 (03) :1408-1410

[7] Microstructured magnetic tunnel junctions [J].

Gallagher, WJ ;

Parkin, SSP ;

Lu, Y ;

Bian, XP ;

Marley, A ;

Roche, KP ;

Altman, RA ;

Rishton, SA ;

Jahnes, C ;

Shaw, TM ;

Xiao, G .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :3741-3746

[8] Magnetic stability of nano-particles: The role of dipolar instability pockets [J].

Grimsditch, M ;

Berger, A ;

Johnson, J ;

Metlushko, V ;

Ilic, B ;

Neuzil, P ;

Kumar, R .

EUROPHYSICS LETTERS, 2001, 54 (06) :813-819

[9] Magnetization reversal due to vortex nucleation, displacement, and annihilation in submicron ferromagnetic dot arrays [J].

Guslienko, KY ;

Novosad, V ;

Otani, Y ;

Shima, H ;

Fukamichi, K .

PHYSICAL REVIEW B, 2002, 65 (02) :244141-2441410

[10] Field evolution of magnetic vortex state in ferromagnetic disks [J].

Guslienko, KY ;

Novosad, V ;

Otani, Y ;

Shima, H ;

Fukamichi, K .

APPLIED PHYSICS LETTERS, 2001, 78 (24) :3848-3850