Magnetic Properties of Nanomaterials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (20 October 2021) | Viewed by 3011
Related Special Issue: Magnetic Properties of Nanomaterials

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Guest Editor
Institut de Chimie et des Matériaux Paris-Est, ICMPE–CNRS, 94320 Thiais, France
Interests: solid state physics; magnetic nanomatrials; magnetocaloric materials; multifunctional magnetic materials; permanent magnets; intermetallic compounds; superparamagnetism
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Special Issue Information

Dear Colleagues,

The aim of this special issue is to give the opportunity to researchers working in different fields related to the "Magnetic Properties of Nanomaterials" to submit manuscripts: review papers, full articles and short communications.

New magnetic materials are emerging, and their various applications demonstrate that they are essential in our everyday lives. Hard, semi-hard and soft magnetic nanomaterials allow a significant improvement in energy conversion. Thus, these nanomaterials play a key role in addressing today's challenges and particularly those concerning the reduction of fossil fuel consumption and climate change.

Nanomaterials offer a wide range of possibilities in terms of both synthesis and characterization. The changes in properties that occur at such a small scale allow the discovery of innovative and promising properties. In the field of magnetism, several characteristic dimensions are found at the nanoscale, such as the domain wall thickness and the exchange length in hard magnetic phases. In the case of magnetic recording media, nanoscaling allows the increasing of the surface density of the data storage. As for permanent magnets, the energy product has been successfully improved through using nanocomposite phases.

This special issue focuses on many areas of magnetic nanomaterial applications (giant magnetoresistance, automotive applications, high density recording media, magnetic refrigeration, biomedicine...).

Contributions may cover topics such as theoretical work and ab initio calculations, the characterization of magnetic compounds, spintronic materials, magnetic nanoparticles for recording media, shape memory effects, hard magnetic single and nanocomposite phases, and magnetocaloric effects.

You may choose our Joint Special Issue in Magnetochemistry.

Prof. Dr. Lotfi Bessais
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • rare earth based intermetallic compounds
  • soft magnetic materials hard magnetic materials
  • nanocomposites permanent magnets
  • magnetic recording
  • magnetocaloric materials
  • shape reconfigurable materials
  • magnetic imaging
  • magnetic hyperthermia
  • magnetoelectric materials

Published Papers (1 paper)

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Research

15 pages, 2023 KiB  
Article
Effect of Citrate on the Size and the Magnetic Properties of Primary Fe3O4 Nanoparticles and Their Aggregates
by Andrea Atrei, Fariba Fahmideh Mahdizadeh, Maria Camilla Baratto and Andrea Scala
Appl. Sci. 2021, 11(15), 6974; https://doi.org/10.3390/app11156974 - 29 Jul 2021
Cited by 15 | Viewed by 2480
Abstract
The size, size distribution and magnetic properties of magnetite nanoparticles (NPs) prepared by co-precipitation without citrate, in the presence of citrate and citrate adsorbed post-synthesis were studied by X-ray Diffraction (XRD), Dynamic Light Scattering (DLS), Electron Paramagnetic Resonance (EPR) and magnetization measurements. The [...] Read more.
The size, size distribution and magnetic properties of magnetite nanoparticles (NPs) prepared by co-precipitation without citrate, in the presence of citrate and citrate adsorbed post-synthesis were studied by X-ray Diffraction (XRD), Dynamic Light Scattering (DLS), Electron Paramagnetic Resonance (EPR) and magnetization measurements. The aim of this investigation was to clarify the effect of citrate ions on the size and magnetic properties of magnetite NPs. The size of the primary NPs, as determined by analysing the width of diffraction peaks using various methods, was ca. 10 nm for bare magnetite NPs and with citrate adsorbed post-synthesis, whereas it was around 5 nm for the NPs co-precipitated in the presence of citrate. DLS measurements show that the three types of NPs form aggregates (100–200 nm in diameter) but the dispersions of the citrate-coated NPs are more stable against sedimentation than those of bare NPs. The sizes and size distributions determined by XRD are in good agreement with those of the magnetic domains obtained by fitting of the magnetization vs. magnetic field intensity curves. Magnetization vs. magnetic field intensity curves show that the three kinds of sample are superparamagnetic. Full article
(This article belongs to the Special Issue Magnetic Properties of Nanomaterials)
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