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Magnetochemistry
Special Issues
Spintronics, Magnetic Semiconductors and Devices
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Spintronics, Magnetic Semiconductors and Devices

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Spin Crossover and Spintronics".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 7880

Special Issue Editor

Prof. Dr. Yuan-Chieh Tseng

E-Mail Website
Guest Editor
Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
Interests: spintronics; ferroelectric devices; magnetoelectric devices; spin–orbit devices; spin-to-charge conversion; oxide high-k devices; synchrotron X-ray characterizations

Special Issue Information

Dear Colleagues,

In recent years, the development of nanoscale components has become a trend for ICs to achieve faster and denser requirements, and the spin-related interactions between carriers have become increasingly important. Therefore, the next generation of electronic devices must utilize both charge and spin properties of electrons in nanostructures. Spintronics, which combines the two fields of magnetism and electronics, and the application of spintronics will be one of the main areas of future research and development. This Special Issue is a forum dedicated to spintronics and magnetic semiconductor devices, covering both fundamental science and technological applications.

I encourage scientists around the world to raise the visibility of this field in the scientific community through this Special Issue.

Prof. Dr. Yuan-Chieh Tseng
Guest Editor

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. Magnetochemistry is an international peer-reviewed open access monthly 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 2700 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

  • novel magnetic thin films and nanostructures
  • magnetic random access memory
  • spin-to-charge conversion devices
  • spin–orbit phenomena and devices
  • spin-injection and neuromorphic computing
  • multiferroic materials and devices
  • magneto-electric phenomena and devices
  • voltage-controlled magnetism
  • complex magnetic oxides
  • novel magnetic exchange in thin films
  • magnetic sensors

Published Papers (3 papers)

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Research

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13 pages, 3800 KiB  
Article
Layered Organic Conductors Based on BEDT-TTF and Ho, Dy, Tb Chlorides
by Alexandra M. Flakina, Elena I. Zhilyaeva, Gennady V. Shilov, Maxim A. Faraonov, Svetlana A. Torunova and Dmitri V. Konarev
Magnetochemistry 2022, 8(11), 142; https://doi.org/10.3390/magnetochemistry8110142 - 28 Oct 2022
Cited by 2 | Viewed by 1250
Abstract
Molecular semiconductors with lanthanide ions have been synthesized based on BEDT-TTF and lanthanide chlorides: (BEDT-TTF)2[HoCl2(H2O)6]Cl2(H2O)2 (1, which contains a 4f holmium cation), and (BEDT-TTF)2LnCl4 [...] Read more.
Molecular semiconductors with lanthanide ions have been synthesized based on BEDT-TTF and lanthanide chlorides: (BEDT-TTF)2[HoCl2(H2O)6]Cl2(H2O)2 (1, which contains a 4f holmium cation), and (BEDT-TTF)2LnCl4(H2O)n (Ln = Dy, Tb, Ho (2–4), which contain 4f anions of lanthanides). Conductivity and EPR measurements have been carried out along with the SQUID magnetometry, and the crystal structure has been established for 1. The structure of 1 is characterized by an alternation of organic radical cation layers composed of BEDT-TTF chains and inorganic layers consisting of chains of the [HoCl2(H2O)6]+ cations interlinked by chlorine anions and crystallization water molecules. The magnetic susceptibility of 1–3 determined mainly by lanthanide ions follows the Curie–Weiss law with the Weiss temperatures of −3, −3, −2 K for 1–3, respectively, indicating weak antiferromagnetic coupling between paramagnetic lanthanide ions. The signals attributed to the BEDT-TTF+· radical cations only are observed in the EPR spectra of 1–3, which makes it possible to study their magnetic behavior. There are two types of chains in the organic layers of 1: the chains composed of neutral molecules and those formed by BEDT-TTF+· radical cations. As a result, uniform 1D antiferromagnetic coupling of spins is observed in the BEDT-TTF+· chains with estimated exchange interaction J = −10 K. The study of dynamic magnetic properties of 1–3 shows that these compounds are not SMMs. Full article
(This article belongs to the Special Issue Spintronics, Magnetic Semiconductors and Devices)
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Review

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26 pages, 4898 KiB  
Review
Magnetic Semiconductors as Materials for Spintronics
by Andrei Telegin and Yurii Sukhorukov
Magnetochemistry 2022, 8(12), 173; https://doi.org/10.3390/magnetochemistry8120173 - 29 Nov 2022
Cited by 7 | Viewed by 3282
Abstract
From the various aspects of spintronics the review highlights the area devoted to the creation of new functional materials based on magnetic semiconductors and demonstrates both the main physical phenomena involved and the technical possibilities of creating various devices: maser, p-n diode with [...] Read more.
From the various aspects of spintronics the review highlights the area devoted to the creation of new functional materials based on magnetic semiconductors and demonstrates both the main physical phenomena involved and the technical possibilities of creating various devices: maser, p-n diode with colossal magnetoresistance, spin valve, magnetic lens, optical modulators, spin wave amplifier, etc. Particular attention is paid to promising research directions such as ultrafast spin transport and THz spectroscopy of magnetic semiconductors. Special care has been taken to include a brief theoretical background and experimental results for the new spintronics approach employing magnetostrictive semiconductors—strain-magnetooptics. Finally, it presents top-down approaches for magnetic semiconductors. The mechano-physical methods of obtaining and features of the physical properties of high-density nanoceramics based on complex magnetic oxides are considered. The potential possibility of using these nanoceramics as an absorber of solar energy, as well as in modulators of electromagnetic radiation, is shown. Full article
(This article belongs to the Special Issue Spintronics, Magnetic Semiconductors and Devices)
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11 pages, 1368 KiB  
Review
A Review of the Self-Powered Wiegand Sensor and Its Applications
by Chiao-Chi Lin, Yuan-Chieh Tseng and Tsung-Shune Chin
Magnetochemistry 2022, 8(10), 128; https://doi.org/10.3390/magnetochemistry8100128 - 17 Oct 2022
Cited by 2 | Viewed by 2291
Abstract
Self-powered magnetic sensors are fundamental for the development of Industry 4.0, the Internet of things (IoT), wireless sensor networks, unmanned vehicles, smart cities, and sustainability. This review aimed to elucidate the working principles, materials, manufacture, output properties, and perspectives of Wiegand sensors. A [...] Read more.
Self-powered magnetic sensors are fundamental for the development of Industry 4.0, the Internet of things (IoT), wireless sensor networks, unmanned vehicles, smart cities, and sustainability. This review aimed to elucidate the working principles, materials, manufacture, output properties, and perspectives of Wiegand sensors. A Wiegand sensor is composed of a magnetic sensing wire, which is called a Wiegand wire, and a pick-up coil for the output of an electrical signal and energy. The Wiegand sensor requires an external magnetic field of about 70 Gauss to induce Wiegand wire flux changes, which, in turn, generate an output pulse in the pick-up coil. Output energy of more than 3000 nJ per single pulse (open circuit) can be harvested. The output pulse is derived from the large Barkhausen effect. Therefore, the behavior of the sensor output is independent of the triggering and sensing frequencies. The objective of this review article was to comprehensively highlight research endeavors devoted to Wiegand sensors. Furthermore, application scenarios of current research results are highlighted to find potential gaps in the literature and future contributions. Perspectives and research opportunities of Wiegand sensors are proposed. Full article
(This article belongs to the Special Issue Spintronics, Magnetic Semiconductors and Devices)
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