Optimum thickness of soft magnetic phase in FePt/FeCo permanent magnet superlattices with high energy product and large magnetic anisotropy energy

Jain, Sandeep Kumar; Chittari, Bheema Lingam; Kumar, Vijay

doi:10.1063/1.4943082

Cited by 6 publications

(3 citation statements)

References 29 publications

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“…In NiFe(10-30 nm)/Co(10 nm) bilayer systems, it is found that the coercivity decreases with the increase in soft layer thickness [12]. In (FePt) m /(FeCo) n magnetic systems, magnetization increases (decreases) with the increase of FeCo (FePt) layers whereas the magnetic anisotropy energy (K U ) decreases as FeCo layer is increased [13]. By varying the thickness of the NiFe layer in the Co/NiFe bilayer, a change in interface exchange coupling and uniaxial aisotropy is observed [14].…”

Section: Introductionmentioning

confidence: 99%

Tuning of magnetic properties by alternating the order of hard/soft bilayers with various thicknesses

Nayak¹,

Singh²,

Mallick³

et al. 2019

J. Phys. D: Appl. Phys.

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Controlled tuning of magnetic anisotropy and damping is essential in ferromagnetic systems for various spintronic applications. In this context, magnetic bilayers with different thicknesses of soft (Co) and hard (Co40Fe40B20) layers have been prepared using magnetron sputtering technique by alternating the order of the constituent magnetic layers. We have observed an increase in the coercive field (HC) by increasing the thickness of the Co layer. Further, for the same constituent layers, HC increases for the case when CoFeB is at the bottom of Co. We further show that by this deposition methodology, one can systematically tune the domain structure. The line width and hence the Gilbert damping constant () of the bilayers can also be modified by alternating the order and thickness of the individual magnetic layers.

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Section: Introductionmentioning

confidence: 99%

Tuning of magnetic properties by alternating the order of hard/soft bilayers with various thicknesses

Nayak¹,

Singh²,

Mallick³

et al. 2019

J. Phys. D: Appl. Phys.

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“…This conversion makes it possible to deduce (BH) max = μ 0 M 2 s /4. [ 32 ] The results demonstrate a significant increase in H c , reaching 33.5 kOe for δ Co = 100 nm, with a remanence M r of 157 emu cm −3 and a maximum magnetic energy (BH) max = 7.68 MGOe, associated with a remanence ratio M r / M s = 0.69 > 0.50. These data suggest magnetic interactions between adjacent crystallites within these films.…”

Section: Resultsmentioning

confidence: 97%

Exploration of the Magnetic Properties of ZrCo:Co Bilayer Films: Effects of the Thickness of the Co Layer on the Anisotropy and Magnetic Interaction Parameters

Fersi,

Apolo Palarizato

2024

Physica Status Solidi (a)

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The analysis of ZrCo:Co films with varying Co layer thicknesses reveals distinctive magnetic properties and behaviors. Despite significant roughness, the films exhibit uniform surfaces and complete crystallization at the nanoscale. Magnetic studies show positive remanence anisotropy, decreased coercivity Hc and remanent magnetization Mr with increasing film thickness, along with a linear correlation between thickness and surface roughness. Exchange interactions between grains and layers influence magnetic properties. Ferromagnetic resonance analysis demonstrates a direct correlation between film thickness and magnetization orientation preference, notably at δCo = 200 nm. These findings underscore the critical role of film thickness in determining microstructural and magnetic properties, offering insights for magnetic device and nanotechnology applications. Understanding these relationships may lead to thickness‐tunable magnetic materials. This study uniquely explores ZrCo:Co films, delving into how their magnetic properties vary with Co layer thickness, revealing novel magnetic behaviors.

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“…Soft magnetic materials are those materials that are easily magnetized and also demagnetized, [1][2][3] which can be divided into three categories: soft magnetic oxide, soft magnetic alloy and soft magnetic composites (SMCs). The soft magnetic oxide is a kind of ferrimagnetic material with medium saturation magnetization (M s ) but with low eddy current.…”

Section: Introductionmentioning

confidence: 99%

FeSiAl soft magnetic composites with NiZn ferrite coating produced via solvothermal method

Peng

Yang

et al. 2017

AIP Advances

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NiZn ferrites were selected as coating agents to prepare NiZn/FeSiAl soft magnetic composites (SMCs) in order to improve the soft magnetic property. It is based upon the higher permeability of magnetic NiZn ferrites than that of traditional nonmagnetic coatings, and also relative higher resistance than that of MnZn ferrites. The effects of molding pressure, annealing temperature, and content of insulation on the magnetic properties were studied. As molding pressure increases, the effective permeability increases firstly and then decreases, while the core loss shows a reverse trend, and both get the best performance at 1.6 GPa. With increasing temperature, the permeability increases, reaches the maximum value at 660 °C and then decreases, while the core loss has a reverse trend, and both get the minimum value at 700 °C. The permeability increases with increasing NiZn from 0.1% to 3%, and then decreases. The D-C bias property of FeSiAl SMCs increases with increasing both mica and NiZn content. The larger resistance of mica also causes the better D-C bias property.

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Optimum thickness of soft magnetic phase in FePt/FeCo permanent magnet superlattices with high energy product and large magnetic anisotropy energy

Cited by 6 publications

References 29 publications

Tuning of magnetic properties by alternating the order of hard/soft bilayers with various thicknesses

Tuning of magnetic properties by alternating the order of hard/soft bilayers with various thicknesses

Exploration of the Magnetic Properties of ZrCo:Co Bilayer Films: Effects of the Thickness of the Co Layer on the Anisotropy and Magnetic Interaction Parameters

FeSiAl soft magnetic composites with NiZn ferrite coating produced via solvothermal method

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