The microstructure and magnetic behaviors of Pr Fe B/Fe7Co3 dual phase nanowires: As a perpendicular magnetic recording candidate

Pang, Rouxiao; Cui, Chunxiang; Yang, Wei; Kang, Licong

doi:10.1016/j.matchar.2021.111410

Cited by 1 publication

(2 citation statements)

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“…During multiphase structure transformation, it is easier for the phase with smaller ΔG to overcome the energy barrier, then nucleate and grow up, completing phase transition. Based on this, the thermodynamic formula of the Arrhenius Equation can be extended and obtained from the following formulas [ 29 ]:

wherein

and

are the crystallization rates for the phase in nanowires annealed at different temperatures of T 1 (570 °C) and T 2 (600 °C), respectively. I max i is the maximum diffraction peak intensity of each phase in annealed nanowires.…”

Section: Resultsmentioning

confidence: 99%

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Study on the Microstructure and Magnetic Properties of Nd-Fe-B/Fe-Co Composite Nanowires

et al. 2023

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To solve the problem of the low coercivity of Nd-Fe-B-based nanowires impeding their application in magnetic storage media, highly ordered Nd-Fe-B/Fe-Co composite nanowires were fabricated in an anodic alumina template by means of the alternating electrochemical deposition method. In this paper, the effect of soft and hard magnetic phase compositing on the magnetic properties of Nd-Fe-B-based nanowires was investigated, and the coercivity improvement mechanism was demonstrated. The results show that after annealing at 600 °C for 2 h, Nd-Fe-B/Fe-Co nanowires crystallize into a multiphase structure containing a hard Nd2(Fe, Co)14B phase and soft NdB4, NdB6, Fe7Nd, and Fe7Co3 phases. It is characterized that the Nd2(Fe, Co)14B phase preferentially nucleates, followed by NdB4 + NdB6 + Fe7Nd, while Fe7Co3 has been formed in as-deposited nanowires. The existence of a Nd2(Fe, Co)14B phase with high anisotropy fields, the remanence enhancement effect produced by exchange coupling between hard–soft magnetic phases, and the pinning effect between different phases make the composite nanowires approximately exhibit single hard magnetic phase characteristics with coercivity and remanence ratio as high as 4203.25 Oe and 0.89. The results indicate that synthesizing Nd-Fe-B/Fe-Co exchange-coupled composite nanowires via alternating electrodeposition is an effective way to optimize the magnetic performance of Nd-Fe-B-based nanowires.

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wherein

and

Section: Resultsmentioning

confidence: 99%

“…During multiphase structure transformation, it is easier for the phase with smaller ∆G to overcome the energy barrier, then nucleate and grow up, completing phase transition. Based on this, the thermodynamic formula of the Arrhenius Equation can be extended and obtained from the following formulas [29]:…”

Section: Phase Analysismentioning

confidence: 99%