钴基非晶丝间磁偶极相互作用的微磁学研究Micromagnetic study of magnetic dipolar interaction in Co-based amorphous wires
高瑞新
摘要(Abstract):
采用微磁学模拟软件OOMMF研究了具有纵向磁结构的钴基非晶丝间的磁偶极相互作用。结果显示,对于平行排列的N根非晶丝阵列(1≤N≤4),随着非晶丝数量的增加,阵列的磁滞回线呈现N个台阶与N–1个平台,并且非晶丝阵列发生第一次磁反转所对应的外磁场逐渐向低场移动,发生最后一次磁反转所对应的外磁场逐渐向高场移动。着重分析双丝系统发现,随着丝长度或者丝间距的增大,磁滞回线的平台宽度逐渐减小。以上现象归因于非晶丝在退磁过程中受到了周围丝偶极场的作用。
关键词(KeyWords): 钴基非晶丝;微磁学模拟;磁偶极相互作用;磁反转;磁滞回线
基金项目(Foundation):
作者(Author): 高瑞新
DOI: 10.19594/j.cnki.09.19701.2021.06.004
参考文献(References):
- [1] Escrig J, Allende S, Altbir D, et al. Magnetostatic interactions between magnetic nanotubes[J]. Appl Phys Lett, 2008, 93:023101.
- [2] Guerra Y, Pe?a-Garcia R, Padrón-Hernández E. Dipolar magnetic interaction effects in 2D hexagonal array of cobalt hollow-spheres[J]. J Magn Magn Mater, 2018, 451:269-275.
- [3] Zhukov A, Ipatov M, Corte-León P, et al. Soft magnetic microwires for sensor applications[J]. J Magn Magn Mater,2020, 498:166180.
- [4] Varga R, Garcia K L, Vazquez M, et al. Single-domain wall propagation and damping mechanism during magnetic switching of bistable amorphous microwires[J]. Phys Rev Lett, 2005, 94(1):017201.
- [5] Pratzer M, Elmers H J. Lateral indirect exchange coupling in a two-dimensional nanostripe array[J]. Phys Rev B,2002, 66(3):033402.
- [6] Knobel M, Sampaio L C, Sinnecker E H C P, et al. Dipolar magnetic interactions among magnetic microwires[J]. J Magn Magn Mater, 2002, 249:60-72.
- [7] Yu W Q, Zou J T, Li X, et al. Study of dipolar interaction in amorphous microwires using longitudinally driven magneto-impedance effect[J]. J Magn Magn Mater, 2018,452:331-334.
- [8] Piccin R, Laroze D, Knobel M, et al. Magnetostatic interactions between two magnetic wires[J]. Europhys Lett,2007, 78:67004.
- [9] Pereira A, Denardin J C, Escrig J. How do magnetic microwires interact magnetostatically[J]. J Appl Phys,2009, 105(8):083903.
- [10] Velazquez J, Pirota K R, Vazquez M. About the dipolar approach in magnetostatically coupled bistable magnetic micro and nanowires[J]. IEEE Trans Magn, 2003, 39(5):3049-3051.
- [11] Zighem F, Maurer T, Ott F, et al. Dipolar interactions in arrays of ferromagnetic nanowires:a micromagnetic study[J]. J Appl Phys, 2011, 109(1):013910.
- [12] Salazar-Aravena D, Palma J L, Escrig J. Magnetostatic interactions between wire-tube nanostructures[J]. J Appl Phys, 2015, 117(19):193905.
- [13] Donahue M J, Porter D G. OOMMF User’s Guide,Version1.2b2[EB/OL].[2018-09-30]. http://math.nist.gov/oommf.
- [14] Brown Jr W F, Micromagnetics[M]. New York:Wiley InterScience, 1963.
- [15] Li H J, Yue M, Wu Q, et al. Effects of dipolar interactions on magnetic properties of Co nanowire arrays[J]. Chin Phys B, 2017, 26(11):117503.
- [16] Gilbert T L. A Lagrangian formulation of the gyromagnetic equation of the magnetic field[J]. Phys Rev, 1955, 100:1243.
- [17] Chiriac H, Corodeanu S, Ovari T A. Dipolar interaction between amorphous microwires[J]. IEEE Trans Magn,2008, 44(4):479-484.
- [18] Betancourt I, Hrkac G, Schrefl T. Magnetic domain structure and magnetization reversal in amorphous microwires with circular anisotropy:a micromagnetic approach[J]. J Appl Phys, 2011, 109(1):013902.
- [19] Sampaio L C, Sinnecker E H C P, Cernicchiaro G R C, et al.Magnetic microwires as macrospins in a long-range dipole-dipole interaction[J]. Phys Rev B, 2000, 61(13):8976-8983.
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