Magnetic interactions in anisotropic Nd-Dy-Fe-Co-B/α-Fe multilayer magnets

被引:20
作者
Dai, Z. M. [1 ]
Liu, W. [1 ]
Zhao, X. T. [1 ]
Han, Z. [1 ]
Kim, D. [2 ]
Choi, C. J. [2 ]
Zhang, Z. D. [1 ]
机构
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] Korea Inst Mat Sci, Powder & Ceram Div, 797 Changwon Daero, Chang Won 642831, South Korea
关键词
EXCHANGE-SPRING MAGNET; NANOCOMPOSITE FILMS; ENERGY PRODUCT; REMANENCE ENHANCEMENT; PERMANENT-MAGNET; LAYER; SPACER;
D O I
10.1063/1.4964804
中图分类号
O59 [应用物理学];
学科分类号
摘要
The magnetic properties and the possible interaction mechanisms of anisotropic soft-and hard-magnetic multilayers have been investigated by altering the thickness of different kinds of spacer layers. The metal Ta and the insulating oxides MgO, Cr2O3 have been chosen as spacer layers to investigate the characteristics of the interactions between soft-and hard-magnetic layers in the anisotropic Nd-Dy-Fe-Co-B/alpha-Fe multilayer system. The dipolar and exchange interaction between hard and soft phases are evaluated with the help of the first order reversal curve method. The onset of the nucleation field and the magnetization reversal by domain wall movement are also evident from the first-order-reversal-curve measurements. Reversible/irreversible distributions reveal the natures of the soft-and hard-magnetic components. Incoherent switching fields are observed and the calculations show the semiquantitative contributions of hard and soft components to the system. An antiferromagnetic spacer layer will weaken the interaction between ferromagnetic layers and the effective interaction length decreases. As a consequence, the dipolar magnetostatic interaction may play an important role in the long-range interaction in anisotropic multilayer magnets. Published by AIP Publishing.
引用
收藏
页数:7
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