Fabrication and magnetic properties of Tb-doped multiphase Pr-Tb-Fe-B magnetic nanowire arrays

Pang, Rouxiao; Cui, Chunxiang; Yang, Wei; Guo, Manfei

doi:10.1016/j.matchemphys.2021.124299

Cited by 3 publications

(3 citation statements)

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“…The generation of the hard magnetic phase Nd 2 (Fe, Co) 14 B with a high anisotropy field hinders the nucleation of the magnetization reversal domain nucleus and the rotation of the magnetic domain, thereby enhancing the coercivity. At the same time, according to the XRD results and Formula (8) [ 31 , 32 ]:

The content of the hard magnetic Nd2(Fe, Co)14B phase in Nd-Fe-B/Fe-Co composite nanowires prepared via alternating electrodeposition can be calculated as a volume fraction of 0.81, which is significantly higher than that of the hard magnetic phase Nd2Fe14B (volume fraction of 0.73) in Nd-Fe-B nanowires. This is due to the presence of Co ions in the alternating deposition process, which promotes more Nd ions in the electrolyte to be pulled into the AAO template and induces co-deposition, increasing the deposition quantity of Nd atoms and providing favorable conditions for the subsequent generation of a greater amount of hard magnetic phases.…”

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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Section: Resultsmentioning

confidence: 99%

…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2023

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“…It is well known that the addition of nonmagnetic impurities to ferromagnetic NWs can greatly improve their magnetic properties [9][10][11][12]. Among the various methods for the preparation of NWs, including lithography [13], sputtering [14,15], vapor deposition [16], molecular beam epitaxy (MBE) [17], template-assisted electrodeposition is a popular way to obtain a uniform, highly ordered NW arrays and has been shown to be one of the simplest and most inexpensive easily controlled methods [9][10][11][12][18][19][20][21][22][23]. On the other hand, the properties of electrodeposited NWs in AAO templates can be controlled by several factors; such as current density, electrolyte composition, time of deposition, temperature, reduction potential (different for each material), pH, microstructure peculiarities etc.…”

Section: Introductionmentioning

confidence: 99%