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Magnetochemistry
Special Issues
Functional Magnetic Materials
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Functional Magnetic Materials

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

Deadline for manuscript submissions: closed (30 April 2021) | Viewed by 4502

Special Issue Editor

Prof. Dr. Adam J. Hauser

E-Mail Website
Guest Editor
Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA
Interests: new electronic and magnetic materials; functional materials; spintronic materials; nanoparticle/polymer chemical sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Functional magnetic materials are systems that can be manipulated by or measured in response to external stimuli (magnetic field, light, pressure, temperature, chemical exposure). These materials are critical to the information technology, sensing, transportation and energy sectors. However, it is critical to first understand the relationship between a material's observable properties and its atomic ordering, defects, external fields, and chemical reactivity, if one hopes to transfer new materials to everyday application.

This Special Issue of Magnetochemistry aims to feature research (experimental or theoretical) that investigates the relationship between the interdependent properties (structural, magnetic, doping, composition, defect profile) of a material or device and its functional properties. Original research or review articles are both of interest.  

Prof. Dr. Adam J. Hauser
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

  • magnetic anisotropy
  • skyrmions
  • magnetocaloric
  • ferromagnetic resonance
  • spin-orbit coupling
  • magnetodynamics
  • nanoparticles
  • magnetic sensing
  • permanent magnets
  • magnetic MOFs
  • magnetic recording
  • magnetic memory
  • intermetallic compounds
  • ordered magnetic alloys
  • contrast agents
  • microwave devices
  • photofunctional molecular magnets

Published Papers (2 papers)

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Research

10 pages, 4141 KiB  
Article
Short- and Long-Range Microparticle Transport on Permalloy Disk Arrays in Time-Varying Magnetic Fields
by Gregory Butler Vieira, Eliza Howard, Dung Hoang, Ryan Simms, David Alden Raymond and Edward Thomas Cullom
Magnetochemistry 2021, 7(8), 120; https://doi.org/10.3390/magnetochemistry7080120 - 23 Aug 2021
Cited by 2 | Viewed by 1924
Abstract
We investigate maneuvering superparamagnetic microparticles, or beads, in a remotely-controlled, automated way across arrays of few-micron-diameter permalloy disks. This technique is potentially useful for applying tunable forces to or for sorting biological structures that can be attached to magnetic beads, for example nucleic [...] Read more.
We investigate maneuvering superparamagnetic microparticles, or beads, in a remotely-controlled, automated way across arrays of few-micron-diameter permalloy disks. This technique is potentially useful for applying tunable forces to or for sorting biological structures that can be attached to magnetic beads, for example nucleic acids, proteins, or cells. The particle manipulation method being investigated relies on a combination of stray fields emanating from permalloy disks as well as time-varying externally applied magnetic fields. Unlike previous work, we closely examine particle motion during a capture, rotate, and controlled repulsion mechanism for particle transport. We measure particle velocities during short-range motion—the controlled repulsion of a bead from one disk toward another—and compare this motion to a simulation based on stray fields from disk edges. We also observe the phase-slipping and phase-locked motion of particles engaging in long-range transport in this manipulation scheme. Full article
(This article belongs to the Special Issue Functional Magnetic Materials)
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15 pages, 2127 KiB  
Article
Simulation and Theory of Classical Spin Hopping on a Lattice
by Richard Gerst, Rodrigo Becerra Silva and Nicholas J. Harmon
Magnetochemistry 2021, 7(6), 88; https://doi.org/10.3390/magnetochemistry7060088 - 20 Jun 2021
Viewed by 1975
Abstract
The behavior of spin for incoherently hopping carriers is critical to understand in a variety of systems such as organic semiconductors, amorphous semiconductors, and muon-implanted materials. This work specifically examined the spin relaxation of hopping spin/charge carriers through a cubic lattice in the [...] Read more.
The behavior of spin for incoherently hopping carriers is critical to understand in a variety of systems such as organic semiconductors, amorphous semiconductors, and muon-implanted materials. This work specifically examined the spin relaxation of hopping spin/charge carriers through a cubic lattice in the presence of varying degrees of energy disorder when the carrier spin is treated classically and random spin rotations are suffered during the hopping process (to mimic spin–orbit coupling effects) instead of during the wait time period (which would be more appropriate for hyperfine coupling). The problem was studied under a variety of different assumptions regarding the hopping rates and the random local fields. In some cases, analytic solutions for the spin relaxation rate were obtained. In all the models, we found that exponentially distributed energy disorder led to a drastic reduction in spin polarization losses that fell nonexponentially. Full article
(This article belongs to the Special Issue Functional Magnetic Materials)
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