Low-dimensional hard magnetic materials

Mohapatra, Jeotikanta; Joshi, Pramanand; Liu, J. Ping

doi:10.1016/j.pmatsci.2023.101143

Cited by 9 publications

(4 citation statements)

References 214 publications

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“…Consequently, these magnetostatic interactions contribute to a reduction in coercivity. The magnetostatic interactions primarily occur at the ends of the neighboring one-dimensional nanowires, while their influence is less pronounced in the middle region . In the present work, the synthesis of one-dimensional nanostructured fibers confers an advantage in mitigating the effects of magnetostatic interactions relative to zero-dimensional spherical particles.…”

Section: Discussionmentioning

confidence: 76%

Strategies for the Synthesis of Nanostructured SmCo₅ Magnetic Particles for Permanent Magnetic Application

Yang,

Wang,

et al. 2024

ACS Appl. Nano Mater.

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Hard magnetic materials based on SmCo 5 , known for their high coercivity, have found extensive applications in advanced technologies. To further enhance their magnetic performance, it is advantageous to reduce the particle size slightly below the singledomain limit and modify the shape to a one-dimensional (1D) structure. Here, two strategies were introduced with the aim to synthesize the anisotropic SmCo 5 nanostructured magnetic powder. The first approach involving electrospinning and reduction-diffusion failed to generate the desired one-dimensional structure, resulting in zero-dimensional (0D) SmCo 5 spherical particles with a coercivity of 34.5 kOe and a maximum magnetic energy product of 14 MGOe. In contrast, the second approach, which combines the modified polyol process with reduction-diffusion, yielded a SmCo 5 magnetic powder with two distinct morphologies: zero-dimensional spherical particles and one-dimensional nanofibers. The SmCo 5 magnetic powder synthesized by the second method exhibits a coercivity of 47.2 kOe and a maximum magnetic energy product of 17 MGOe, significantly exceeding those reported for zero-dimensional spherical SmCo 5 nanoparticles. This high-performance SmCo 5 magnetic powder holds considerable promise for high-density data storage and permanent magnet applications. Moreover, it provides avenues for developing exchange-coupled nanocomposite magnets with a high energy density. The findings of this study may serve as the foundation for exploiting anisotropic SmCo 5 nanomagnets and hold significant implications for the design of advanced magnetic materials using the reduction-diffusion method.

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Section: Discussionmentioning

confidence: 76%

Strategies for the Synthesis of Nanostructured SmCo₅ Magnetic Particles for Permanent Magnetic Application

Yang,

Wang,

et al. 2024

ACS Appl. Nano Mater.

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“…The relationship between magnetic properties and synthesis conditions will be discussed in detail in subsequent sections. As the synthesis of Fe 3 O 4 nanoparticles is not the focal point of this review, the authors refer readers who are interested in more details of these synthesis processes to some representative publications [89][90][91][92].…”

Section: Anisotropic Fe 3 O 4 Nanostructures: Synthesis and Engineeri...mentioning

confidence: 99%

Magnetic and electronic properties of anisotropic magnetite nanoparticles

Mitra,

Mohapatra,

Aslam

2024

Mater. Res. Express

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Magnetic materials at the nanometer scale can demonstrate highly tunable properties as a result of their reduced dimensionality. While significant advancements have been made in the production of magnetic oxide nanoparticles over the past decades, maintaining the magnetic and electronic phase stabilities in the nanoscale regime continues to pose a critical challenge. Finite-size effects modify or even eliminate the strongly correlated magnetic and electronic properties through strain effects, altering density and intrinsic electronic correlations. In this review, we examine the influence of nanoparticle size, shape, and composition on magnetic and tunneling magnetoresistance (TMR) properties, using magnetite (Fe3O4) as an example. The magnetic and TMR properties of Fe3O4 nanoparticles are strongly related to their size, shape, and synthesis process. Remarkably, faceted nanoparticles exhibit bulk-like magnetic and TMR properties even at ultra-small size-scale. Moreover, it is crucial to comprehend that TMR can be tailored or enhanced through chemical and/or structural modifications, enabling the creation of "artificially engineered" magnetic materials for innovative spintronic applications.

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“…LD materials, especially the carbon-based LD materials, are desirable for exploring novel functional devices because of their unique structure and physical properties stemming from the size effect. 1–11 Molecular devices based on fullerenes have been verified through numerous experiments to exhibit excellent properties such as negative differential resistance (NDR) effects, rectification behavior, and superconductivity. 12–17 As representatives of 2D carbon nanomaterials, graphene or its nanoribbons (GNR) have high mobility, large specific surface area, high thermal conductivity, strong mechanical strength, etc.…”

Section: Introductionmentioning

confidence: 99%

NDR and spin-polarized transport properties of magnetic Fe sandwiched C₆₀-GNR single molecule devices: theoretical insight

Liu,

Shang,

et al. 2024

New J. Chem.

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Low-dimensional hard magnetic materials

Cited by 9 publications

References 214 publications

Strategies for the Synthesis of Nanostructured SmCo₅ Magnetic Particles for Permanent Magnetic Application

Strategies for the Synthesis of Nanostructured SmCo₅ Magnetic Particles for Permanent Magnetic Application

Magnetic and electronic properties of anisotropic magnetite nanoparticles

NDR and spin-polarized transport properties of magnetic Fe sandwiched C₆₀-GNR single molecule devices: theoretical insight

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Low-dimensional hard magnetic materials

Cited by 9 publications

References 214 publications

Strategies for the Synthesis of Nanostructured SmCo5 Magnetic Particles for Permanent Magnetic Application

Strategies for the Synthesis of Nanostructured SmCo5 Magnetic Particles for Permanent Magnetic Application

Magnetic and electronic properties of anisotropic magnetite nanoparticles

NDR and spin-polarized transport properties of magnetic Fe sandwiched C60-GNR single molecule devices: theoretical insight

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Strategies for the Synthesis of Nanostructured SmCo₅ Magnetic Particles for Permanent Magnetic Application

Strategies for the Synthesis of Nanostructured SmCo₅ Magnetic Particles for Permanent Magnetic Application

NDR and spin-polarized transport properties of magnetic Fe sandwiched C₆₀-GNR single molecule devices: theoretical insight