Perspectives in Magnetoelectric and Magnetic Nanomaterials

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 4691

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Guest Editor
School of Materials Science and Engineering, The University of New South Wales, Kensington, Sydney, NSW 2052, Australia
Interests: ferrites; magnetic materials; ferro/piezoelectric materials; interface engineering
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Special Issue Information

Dear Colleagues,

Magnetoelectric materials allow constituting magnetic and di/ferroelectric materials to interact such that the electrical response of the di/ferroelectric material can be modulated by magnetically stimulating the magnetic material, and vice versa. Magnetoelectric coupling in composites and heterostructures relies on the interplay among the spin, orbit, charge, and lattice degrees of freedom across the interfaces. Magnetoelectric composites and heterostructures integrate magnetic and dielectric materials to produce new functionalities. Thus, these materials can be applicable in the target magnetic field by analyzing its induced output electric voltage, working as a portable, low-cost magnetic field, electric-write process in magnetic memories, etc.

This Special Issue of Nanomaterials, “Perspectives in Magnetoelectric and Magnetic Nanomaterials”, aims at collecting a compilation of articles that prominently demonstrate the continuous efforts in developing advanced magnetoelectric material-based technologies for various target analytes. It focuses on the synthesis, properties, and prospective sensing applications of nanomaterials. The topics cover a wide range of research fields, including magnetoelectric and magnetic nanomaterials, demonstrating their applications in a variety of technologies.

Dr. Sagar Shirsath
Guest Editor

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Keywords

  • magnetic nanoparticles
  • dielectric materials
  • ferroelectric and ferromagnetic composites/heterostructures
  • single- and dual-phase magnetoelectric materials
  • magnetoelectric properties

Published Papers (3 papers)

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Research

21 pages, 11097 KiB  
Article
A thorough Investigation of Rare-Earth Dy3+ Substituted Cobalt-Chromium Ferrite and Its Magnetoelectric Nanocomposite
by Ram H. Kadam, Ravi Shitole, Santosh B. Kadam, Kirti Desai, Atul P. Birajdar, Vinod K. Barote, Khalid Mujasam Batoo, Sajjad Hussain and Sagar E. Shirsath
Nanomaterials 2023, 13(7), 1165; https://doi.org/10.3390/nano13071165 - 24 Mar 2023
Cited by 23 | Viewed by 1530
Abstract
The stoichiometric compositions of a ferrite system with a chemical formula CoCr0.5DyxFe1.5−xO4 where x = 0.0, 0.025, 0.05, 0.075 and 0.1 were prepared by the sol-gel auto-combustion method. The structural, morphological and magnetic properties were studied [...] Read more.
The stoichiometric compositions of a ferrite system with a chemical formula CoCr0.5DyxFe1.5−xO4 where x = 0.0, 0.025, 0.05, 0.075 and 0.1 were prepared by the sol-gel auto-combustion method. The structural, morphological and magnetic properties were studied by the X-ray diffraction (XRD), infra-red spectroscopy (IR), scanning electron microscopy, transmission electron microscopy and vibrating sample magnetometer. XRD analysis confirmed the cubic spinel structure of the prepared samples without the presence of any impurity and secondary phases. Selected area electron diffraction and IR measurements gives further confirmation to the XRD observations. Considering that strain mechanism, elastic properties and cation distribution play a major role for controlling the magnetic properties and therefore these properties were precisely evaluated through reliable methodologies such as XRD and IR data. The cation distribution was determined by the X-ray diffraction data which are further supported by the magnetization studies. Magnetoelectric properties of CoCr0.5DyxFe1.5−xO4 + BaTiO3 have also been investigated. The mechanisms involved are discussed in the manuscript. Full article
(This article belongs to the Special Issue Perspectives in Magnetoelectric and Magnetic Nanomaterials)
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13 pages, 2679 KiB  
Article
Numerical and Experimental Study of Colored Magnetic Particle Mapping via Magnetoelectric Sensors
by Ron-Marco Friedrich, Mohammad Sadeghi and Franz Faupel
Nanomaterials 2023, 13(2), 347; https://doi.org/10.3390/nano13020347 - 14 Jan 2023
Cited by 3 | Viewed by 1628
Abstract
Colored imaging of magnetic nanoparticles (MNP) is a promising noninvasive method for medical applications such as therapy and diagnosis. This study investigates the capability of the magnetoelectric sensor and projected gradient descent (PGD) algorithm for colored particle detection. In the first step, the [...] Read more.
Colored imaging of magnetic nanoparticles (MNP) is a promising noninvasive method for medical applications such as therapy and diagnosis. This study investigates the capability of the magnetoelectric sensor and projected gradient descent (PGD) algorithm for colored particle detection. In the first step, the required circumstances for image reconstruction are studied via a simulation approach for different signal-to-noise ratios (SNR). The spatial accuracy of the reconstructed image is evaluated based on the correlation coefficient (CC) factor. The inverse problem is solved using the PGD method, which is adapted according to a nonnegativity constraint in the complex domain. The MNP characterizations are assessed through a magnetic particle spectrometer (MPS) for different types. In the experimental investigation, the real and imaginary parts of the MNP’s response are used to detect the spatial distribution and particle type, respectively. The experimental results indicate that the average phase difference for CT100 and ARA100 particles is 14 degrees, which is consistent with the MPS results and could satisfy the system requirements for colored imaging. The experimental evaluation showed that the magnetoelectric sensor and the proposed approach could be potential candidates for color bio-imaging applications. Full article
(This article belongs to the Special Issue Perspectives in Magnetoelectric and Magnetic Nanomaterials)
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19 pages, 6001 KiB  
Article
Effect of Oleylamine on the Surface Chemistry, Morphology, Electronic Structure, and Magnetic Properties of Cobalt Ferrite Nanoparticles
by Sumayya M. Ansari, Bhavesh B. Sinha, Debasis Sen, Pulya U. Sastry, Yesh D. Kolekar and C. V. Ramana
Nanomaterials 2022, 12(17), 3015; https://doi.org/10.3390/nano12173015 - 31 Aug 2022
Cited by 7 | Viewed by 2078
Abstract
The influence of oleylamine (OLA) concentration on the crystallography, morphology, surface chemistry, chemical bonding, and magnetic properties of solvothermal synthesized CoFe2O4 (CFO) nanoparticles (NPs) has been thoroughly investigated. Varying OLA concentration (0.01–0.1 M) resulted in the formation of cubic spinel-structured [...] Read more.
The influence of oleylamine (OLA) concentration on the crystallography, morphology, surface chemistry, chemical bonding, and magnetic properties of solvothermal synthesized CoFe2O4 (CFO) nanoparticles (NPs) has been thoroughly investigated. Varying OLA concentration (0.01–0.1 M) resulted in the formation of cubic spinel-structured CoFe2O4 NPs in the size-range of 20–14 (±1) nm. The Fourier transform spectroscopic analyses performed confirmed the OLA binding to the CFO NPs. The thermogravimetric measurements revealed monolayer and multilayer coating of OLA on CFO NPs, which were further supported by the small-angle X-ray scattering measurements. The magnetic measurements indicated that the maximum saturation (MS) and remanent (Mr) magnetization decreased with increasing OLA concentration. The ratio of maximum dipolar field (Hdip), coercivity (HC), and exchanged bias field (Hex) (at 10 K) to the average crystallite size (Dxrd), i.e., (Hdip/Dxrd), (HC/Dxrd), and (Hex/Dxrd), increased linearly with OLA concentration, indicating that OLA concurrently controls the particle size and interparticle interaction among the CFO NPs. The results and analyses demonstrate that the OLA-mediated synthesis allowed for modification of the structural and magnetic properties of CFO NPs, which could readily find potential application in electronics and biomedicine. Full article
(This article belongs to the Special Issue Perspectives in Magnetoelectric and Magnetic Nanomaterials)
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