Direct observation of magnetic exchange-spring development in epitaxial DyFe2/YFe2 superlattices by magneto-optical Kerr effect

被引：7

作者：

Wang, Ke ^{[1
]}

Xiang, Yang ^{[1
]}

Chen, Chuanwen ^{[1
]}

Zhuang, Fengjiang ^{[1
]}

Wu, Xuefeng ^{[1
]}

Ward, Roger ^{[2
]}

机构：

[1] Huaqiao Univ, Coll Informat Sci & Engn, Xiamen 361021, Peoples R China

[2] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

来源：

FUNCTIONAL MATERIALS LETTERS | 2015年 / 8卷 / 05期

关键词：

Magnetic superlattices; nanostructured multilayers; MBE growth; surface magneto-optical Kerr effect; MICRON-SIZED STRIPES; COERCIVITY; BEHAVIOR; REVERSAL;

D O I：

10.1142/S1793604715500538

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic reversal properties of molecular beam epitaxy (MBE) grown Laves phase single crystal YFe2-dominated DyFe2/YFe2 superlattices were investigated using magneto-optical Kerr effect (MOKE) measurements. Single crystal DyFe2/YFe2 superlattices with a thickness ratio of 1:4 were MBE-grown with a (110) growth direction. In the epitaxial superlattices, the development of exchange-spring structure during magnetic reversal is revealed by both magneto-optical reflectivity and Kerr rotation angle loops. The bending fields of the samples are found to be close due to nonideal anisotropy in both hard and soft layers. For the sample with thin soft/hard layers, large magneto-optical reflectivity change up to 0.25% was observed. This can be related with rotation of Fe spins in YFe2 soft layers under a low pinning field, in consistence with the small switching field of thin DyFe2 hard layers measured experimentally.

引用

页数：4

共 28 条

[1] Negative coercivity in epitaxially grown (110) DyFe2/YFe2 superlattices [J].

Beaujour, JML ;

Gordeev, SN ;

Bowden, GJ ;

de Groot, PAJ ;

Rainford, BD ;

Ward, RCC ;

Wells, MR .

APPLIED PHYSICS LETTERS, 2001, 78 (07) :964-966

[2] Structure of DyFe2/YFe2 Laves phase superlattices grown by molecular beam epitaxy [J].

Bentall, MJ ;

Ward, RCC ;

Grier, EJ ;

Wells, MR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (38) :6493-6512

[3] Discrete exchange-springs in magnetic multilayer samples [J].

Bowden, GJ ;

Beaujour, JML ;

Gordeev, S ;

de Groot, PAJ ;

Rainford, BD ;

Sawicki, M .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (44) :9335-9346

[4]

Chui S. T., 2012, J PHYS D, V45

[5] Thermal dependence of magnetic springs location in a DyFe2/YFe2 superlattice [J].

Dumesnil, K ;

Dufour, C ;

Mangin, P ;

Wilhelm, F ;

Rogalev, A .

JOURNAL OF APPLIED PHYSICS, 2004, 95 (11) :6843-6845

[6] Temperature and thickness dependence of the magnetization reversal in DyFe2/YFe2 exchange-coupled superlattices [J].

Dumesnil, K. ;

Fernandez, S. ;

Avisou, A. ;

Dufour, C. ;

Rogalev, A. ;

Wilhelm, F. ;

Snoeck, E. .

EUROPEAN PHYSICAL JOURNAL B, 2009, 72 (02) :159-171

[7] Spring magnet behavior in DyFe2/YFe2 Laves phases superlattices [J].

Dumesnil, K ;

Dutheil, M ;

Dufour, C ;

Mangin, P .

PHYSICAL REVIEW B, 2000, 62 (02) :1136-1140

[8] Mechanisms of exchange bias in DyFe2/YFe2 exchange-coupled superlattices [J].

Fitzsimmons, M. R. ;

Dufour, C. ;

Dumesnil, K. ;

Dou, Jian ;

Pechan, Michael .

PHYSICAL REVIEW B, 2009, 79 (14)

[9] Vector magnetization depth profile of a Laves-phase exchange-coupled superlattice obtained using a combined approach of micromagnetic simulation and neutron reflectometry [J].

Fitzsimmons, MR ;

Park, S ;

Dumesnil, K ;

Dufour, C ;

Pynn, R ;

Borchers, JA ;

Rhyne, JJ ;

Mangin, P .

PHYSICAL REVIEW B, 2006, 73 (13)

[10] Exchange-spring behavior in epitaxial hard/soft magnetic bilayers [J].

Fullerton, EE ;

Jiang, JS ;

Grimsditch, M ;

Sowers, CH ;

Bader, SD .

PHYSICAL REVIEW B, 1998, 58 (18) :12193-12200

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