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Functional Nanomaterials and Their Ferroelectric, Magnetic or Optical Behavior (Volume II)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Thin Films and Interfaces".

Deadline for manuscript submissions: 20 December 2024 | Viewed by 3226

Special Issue Editors

Prof. Dr. Yuan-Tsung Chen

E-Mail Website
Guest Editor
Graduate School of Materials Science, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
Interests: magnetic materials; semiconductor process; magnetoresistance random access memory (MRAM); surface sciences; analysis of materials; nano (optical) electronic materials and advanced semiconductor technology
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Shih-Hung Lin

E-Mail Website
Guest Editor
Department of Electronic Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan
Interests: nano (optical) electronic materials and advanced component applications; semiconductor and optoelectronic component design and testing technology; biomedical sensors and biomedical electronic engineering; smart networking system design and implementation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Researchers and scholars are invited to actively submit their papers to this Special Issue on thin film materials, such as the field of magnetics, optoelectronics, ferroelectrics, etc. Contributions can focus on fields including magnetic materials, magnetic recording media, tunneling magnetoresistance, magnetostriction, magnetic wall, hard magnet, soft magnetic, nano-optical materials, and piezoelectric materials.

The content of the submitted article can include important film process conditions and methods of the material, as well as important theoretical and experimental results. In addition, it can also describe the application of magnetic ferroelectric and optical materials in related important fields. The article contains a variety of important new discoveries about magnetic, optic, and ferroelectric materials for discussion and verification to ensure the completeness of the article. The submitted manuscripts are divided into the categories as listed below:

  • Magnetic materials and recording media;
  • Functional oxides, nitrides, and inorganic materials;
  • Multilayer electronic ceramic components;
  • Integrated circuit and packaging materials;
  • Inorganic and organic optoelectronic materials and displays;
  • Energy materials;
  • Nanomaterials;
  • Nanoelectronics and optoelectronics;
  • Low-dimensional materials;
  • Applied physics and materials;
  • Calculation material;
  • Other materials.

Prof. Dr. Yuan-Tsung Chen
Dr. Shih-Hung Lin
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Materials 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 2600 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

  • magnetic materials
  • magnetic recording media
  • tunneling magnetoresistance
  • magnetostriction
  • magnetic wall
  • hard magnet
  • soft magnetic
  • nano-optical materials
  • piezoelectric materials

Published Papers (3 papers)

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Research

17 pages, 4902 KiB  
Article
Investigation of Sm Addition on Microstructural and Optical Properties of CoFe Thin Films
by Wen-Jen Liu, Yung-Huang Chang, Chia-Chin Chiang, Jian-Xin Lai, Yuan-Tsung Chen, Hsiung-Liang Chen and Shih-Hung Lin
Materials 2023, 16(15), 5380; https://doi.org/10.3390/ma16155380 - 31 Jul 2023
Viewed by 661
Abstract
CoFe-based alloys and rare earth (RE) elements are among the most studied materials in applying magnetic devices to improve soft magnetic characteristics. A series of Co40Fe40Sm20 films are deposited on a glass substrate via the sputtering technique, followed [...] Read more.
CoFe-based alloys and rare earth (RE) elements are among the most studied materials in applying magnetic devices to improve soft magnetic characteristics. A series of Co40Fe40Sm20 films are deposited on a glass substrate via the sputtering technique, followed by an annealing process to investigate their effect on microstructural and optical properties of Co40Fe40Sm20 films. In this study, the increase in the thickness of Co40Fe40Sm20 films and annealing temperatures resulted in a smoother surface morphology. The 40 nm Co40Fe40Sm20 films annealed 300 °C are expected to have good wear resistance and adhesive properties due to their high values of H/E ratio and surface energy. Optical transparency also increased due to the smoother surface of the Co40Fe40Sm20 films. Full article
(This article belongs to the Special Issue Functional Nanomaterials and Their Ferroelectric, Magnetic or Optical Behavior (Volume II))
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17 pages, 4172 KiB  
Article
Preparation and Characteristics of Polyethylene Oxide/Curdlan Nanofiber Films by Electrospinning for Biomedical Applications
by Shu-Hung Lin, Sin-Liang Ou, Hung-Ming Hsu and Jane-Yii Wu
Materials 2023, 16(10), 3863; https://doi.org/10.3390/ma16103863 - 20 May 2023
Cited by 1 | Viewed by 1091
Abstract
In this study, polyethylene oxide (PEO) and curdlan solutions were used to prepare PEO/curdlan nanofiber films by electrospinning using deionized water as the solvent. In the electrospinning process, PEO was used as the base material, and its concentration was fixed at 6.0 wt.%. [...] Read more.
In this study, polyethylene oxide (PEO) and curdlan solutions were used to prepare PEO/curdlan nanofiber films by electrospinning using deionized water as the solvent. In the electrospinning process, PEO was used as the base material, and its concentration was fixed at 6.0 wt.%. Moreover, the concentration of curdlan gum varied from 1.0 to 5.0 wt.%. For the electrospinning conditions, various operating voltages (12–24 kV), working distances (12–20 cm) and feeding rates of polymer solution (5–50 μL/min) were also modified. Based on the experimental results, the optimum concentration for the curdlan gum was 2.0 wt.%. Additionally, the most suitable operating voltage, working distance and feeding rate for the electrospinning process were 19 kV, 20 cm and 9 μL/min, respectively, which can help to prepare relatively thinner PEO/curdlan nanofibers with higher mesh porosity and without the formation of beaded nanofibers. Finally, the PEO/curdlan nanofiber instant films containing 5.0 wt.% quercetin inclusion complex were used to perform wetting and disintegration processes. It was found that the instant film can be dissolved significantly on the low-moisture wet wipe. On the other hand, when the instant film touched water, it can be disintegrated very quickly within 5 s, and the quercetin inclusion complex was dissolved in water efficiently. Furthermore, when the instant film encountered the water vapor at 50 °C, it almost completely disintegrated after immersion for 30 min. The results indicate that the electrospun PEO/curdlan nanofiber film is highly feasible for biomedical applications consisting of instant masks and quick-release wound dressings, even in the water vapor environment. Full article
(This article belongs to the Special Issue Functional Nanomaterials and Their Ferroelectric, Magnetic or Optical Behavior (Volume II))
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14 pages, 5229 KiB  
Article
The Influence of Annealing and Film Thickness on the Specific Properties of Co40Fe40Y20 Films
by Wen-Jen Liu, Yung-Huang Chang, Chia-Chin Chiang, Yuan-Tsung Chen, Yu-Chi Liu, Yu-Jie Huang and Po-Wei Chi
Materials 2023, 16(6), 2490; https://doi.org/10.3390/ma16062490 - 21 Mar 2023
Cited by 2 | Viewed by 1059
Abstract
Cobalt Iron Yttrium (CoFeY) magnetic film was made using the sputtering technique in order to investigate the connection between the thickness and annealing procedures. The sample was amorphous as a result of an insufficient thermal driving force according to X-ray diffraction (XRD) examination. [...] Read more.
Cobalt Iron Yttrium (CoFeY) magnetic film was made using the sputtering technique in order to investigate the connection between the thickness and annealing procedures. The sample was amorphous as a result of an insufficient thermal driving force according to X-ray diffraction (XRD) examination. The maximum low-frequency alternate-current magnetic susceptibility (χac) values were raised in correlation with the increased thickness and annealing temperatures because the thickness effect and Y addition improved the spin exchange coupling. The best value for a 50 nm film at annealing 300 °C for χac was 0.20. Because electron carriers are less constrained in their conduction at thick film thickness and higher annealing temperatures, the electric resistivity and sheet resistance are lower. At a thickness of 40 nm, the film’s maximum surface energy during annealing at 300 °C was 28.7 mJ/mm2. This study demonstrated the passage of photon signals through the film due to the thickness effect, which reduced transmittance. The best condition was found to be 50 nm with annealing at 300 °C in this investigation due to high χac, strong adhesion, and low resistivity, which can be used in magnetic fields. Full article
(This article belongs to the Special Issue Functional Nanomaterials and Their Ferroelectric, Magnetic or Optical Behavior (Volume II))
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