Advances in Fine Particle Magnetism and Bio-Magnetic Materials

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetic Materials".

Deadline for manuscript submissions: closed (31 July 2022) | Viewed by 5069

Special Issue Editors


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Guest Editor
Biosensor Research Institute, Department of Fine Chemistry, Seoul National University of Science and Technology (SeoulTech), Gongneung-ro 232, Nowon-gu, Seoul 01811, Republic of Korea
Interests: biomagnetic materials; ferromagnetics; magnetic nanofluids; ferrites; magnetic materials chemistry and physics
Special Issues, Collections and Topics in MDPI journals

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Co-Guest Editor
Key Laboratory of Theoretical Chemistry of Environment, School of Chemistry, South China Normal University, Guangzhou 510006, P.R. China
Interests: advanced materials for biomedical applications; energy storage and conversion materials; magnetic materials

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Co-Guest Editor
Department of Physics, K.S. Rangasamy College of Arts and Science (Autonomous), Tiruchengode- 637 215, India
Interests: biomaterials; magnetic nanoparticles for environmental and healthcare applications; photocatalysis; drug delivery; imaging agents; microwave processing; green synthesis

Special Issue Information

Dear Colleagues,

Magnetic materials are unique materials that are present in nature, including insects, bacteria, and several animals. For example, salmon use magnetic materials present in their nasal fossa for migration. With the development of nanotechnology, different magnetic materials have been discovered as storage materials, generators, motor components, transformers, magnetic shape memory, and magnetic devices. There are different types of magnetic materials in solids, such as metal oxides, metals, and magnetic alloys. However, in their colloidal state, they are in the form of nanofluids, ferrofluids, and magnetic fluids. Different classes of magnetic materials are used in several applications. However, in addition to general applications, magnetic materials are also used as bio-magnetic materials in different ways, such as therapy and for diagnosis purposes. The major application of bio-magnetic materials are MRI (magnetic resonance imaging) images, magnetic therapy, hyperthermia, drug delivery, molecular tracers, and as magnetic markers for the detection of infection or disease. Hence, to fabricate novel magnetic materials or bio-magnetic materials for different applications, substantial effort and further development are still required.

Dr. Gopalu Karunakaran
Dr. Govindan Suresh Kumar
Dr. Raji Govindan
Guest Editors

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. Magnetochemistry is an international peer-reviewed open access monthly journal published by MDPI.

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Keywords

  • Magnetic materials
  • Diamagnetic material
  • Ferromagnetic material
  • Paramagnetic material
  • Ferrites
  • Soft magnetic materials
  • Metal nanoparticles
  • Metal oxide nanoparticles
  • Magnetic composites
  • Magnetic thin films
  • Ferrofluids
  • Nanofluids
  • Biomagnetic materials
  • Bioelectromagnetic materials
  • Magnetic materials for diagnosis and cancer treatment

Published Papers (1 paper)

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Research

19 pages, 13993 KiB  
Article
Tuning of Structural, Dielectric, and Electronic Properties of Cu Doped Co–Zn Ferrite Nanoparticles for Multilayer Inductor Chip Applications
by Muhammad Hadi, Khalid Mujasam Batoo, Ankush Chauhan, Omar M. Aldossary, Ritesh Verma and Yujie Yang
Magnetochemistry 2021, 7(4), 53; https://doi.org/10.3390/magnetochemistry7040053 - 14 Apr 2021
Cited by 83 | Viewed by 4279
Abstract
Herein, we report the synthesis of nanoparticles and doping of Cu-doped Co–Zn ferrites using the auto-combustion sol–gel synthesis technique. X-ray diffraction studies confirmed the single-phase structure of the samples with space group Fd3m and crystallite size in the range of 20.57–32.69 [...] Read more.
Herein, we report the synthesis of nanoparticles and doping of Cu-doped Co–Zn ferrites using the auto-combustion sol–gel synthesis technique. X-ray diffraction studies confirmed the single-phase structure of the samples with space group Fd3m and crystallite size in the range of 20.57–32.69 nm. Transmission electron microscopy micrographs and selected area electron diffraction patterns confirmed the polycrystalline nature of the ferrite nanoparticles. Energy-dispersive X-ray spectroscopy revealed the elemental composition in the absence of any impurity phases. Fourier-transform infrared studies showed the presence of two prominent peaks at approximately 420 cm−1 and 580 cm−1, showing metal–oxygen stretching and the formation of ferrite composite. X-ray photoelectron spectroscopy was employed to determine the oxidation states of Fe, Co, Zn, and Cu and O vacancies based on which cationic distributions at tetrahedral and octahedral sites are proposed. Dielectric spectroscopy showed that the samples exhibit Maxwell–Wagner interfacial polarization, which decreases as the frequency of the applied field increases. The dielectric loss of the samples was less than 1, confirming that the samples can be used for the fabrication of multilayer inductor chips. The ac conductivity of the samples increased with increasing doping and with frequency, and this has been explained by the hopping model. The hysteresis loops revealed that coercivity decreases slightly with doping, while the highest saturation magnetization of 55.61 emu/g was obtained when x = 0.1. The magnetic anisotropic constant was found to be less than 0.5, which suggests that the samples exhibit uniaxial anisotropy rather than cubic anisotropy. The squareness ratio indicates that the samples are useful in high-frequency applications. Full article
(This article belongs to the Special Issue Advances in Fine Particle Magnetism and Bio-Magnetic Materials)
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