Possible Effects of Antiferromagnetic Crystalline Phases on the Temperature Dependence of Coercivity for Ni and Co Nanowires Obtained by Electrodeposition,Physica Status Solidi (A) - Applications and Materials Science

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Possible Effects of Antiferromagnetic Crystalline Phases on the Temperature Dependence of Coercivity for Ni and Co Nanowires Obtained by Electrodeposition
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-05-27 , DOI: 10.1002/pssa.201901041
Ramón Raudel Peña-Garcia ₁ , Aldo Mendonça do Nascimento-Junior ₂ , A. Franco ₃ , Cecília Leite do Amaral Veras Campos ₄ , Marcio Heraclyto Gonçalves de Miranda ₄ , Eduardo Padrón-Hernández _{2,

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Affiliation

Herein, the structural and magnetic properties of Ni and Co nanowires obtained by electrodeposition on alumina membranes are studied. Structural analysis shows the coexistence of Ni and Co metallic phases as well as NiO and CoO, which are associated with the preparation method. The magnetic study suggests the possibility of unidirectional anisotropy as a possible mechanism on the magnetization reversal in nickel and cobalt nanowires. For the experimental curves of coercivity versus temperature, there exists a critical value, below which only the dipole interactions are predominant. Above this temperature, the dipole magnetocrystalline and magnetostrictive energy compete in a complicated way. Alongside these three contributions, the coexistence of the “local unidirectional coupling” of antiferromagnetic nanoparticles that engage in random directions on nanowires is proposed.

中文翻译：

反铁磁结晶相对电沉积获得的Ni和Co纳米线矫顽力的温度依赖性的可能影响

在本文中，研究了通过在氧化铝膜上电沉积获得的Ni和Co纳米线的结构和磁性。结构分析表明，Ni和Co金属相以及NiO和CoO共存，这与制备方法有关。磁性研究表明，单向各向异性是镍和钴纳米线磁化反转的一种可能机制。对于矫顽力与温度的实验曲线，存在一个临界值，在该临界值以下，偶极子相互作用才是主要的。在此温度以上，偶极磁晶能和磁致伸缩能以复杂的方式竞争。除了这三个贡献，

更新日期：2020-05-27

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