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Advances in Magnetic Measurements
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Advances in Magnetic Measurements

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Materials Characterization".

Deadline for manuscript submissions: closed (31 August 2020) | Viewed by 10572

Special Issue Editor

Dr. Michał Nowicki

E-Mail Website
Guest Editor
Institute of Metrology and Biomedical Engineering, Warsaw University of Technology, Warsaw, Poland
Interests: magnetic materials; magnetic measurements; magnetoelastic effects; thermoelectricity; novel sensors; measurement systems
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Recent years and the recent century have seen an unprecedented development of magnetic measurement techniques. The scope of the discovered macroscopic effects is extensive, from simple B(H) plots of ferromagnetic materials, through magnetostriction and allied magnetomechanical phenomena, to optical Kerr and electrical Hall effects. In a micro scale, the development of measurement techniques gave rise to spintronics and so on. However, this development is far from over, with new devices being developed every year, as well as the honing of previously known techniques.

Therefore, this Special Issue of Materials is devoted to advances in magnetic measurement techniques, be it in the form of research articles, short communications, or critical reviews of the recent developments in this interesting area. Papers with details of the new measurement procedures, hardware, and software involved are welcome, however investigations of the materials for magnetic sensors and other applications of magnetic measurements are also of interest.     

Dr. Michał Nowicki
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. 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

  • Soft magnetic material
  • Hard magnetic material
  • Magnetic sensors
  • Magnetic measurements
  • Ferromagnetism
  • Magnetoelastic effect
  • Magnetistriction
  • Kerr effect
  • Hall effect
  • Spintronics

Published Papers (4 papers)

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Research

15 pages, 4516 KiB  
Article
Villari Effect at Low Strain in Magnetoactive Materials
by Graciela Riesgo, Laura Elbaile, Javier Carrizo, Rosario Díaz Crespo, María Ángeles García, Yadir Torres and José Ángel García
Materials 2020, 13(11), 2472; https://doi.org/10.3390/ma13112472 - 29 May 2020
Cited by 6 | Viewed by 2504
Abstract
Magnetic composites of soft magnetic FeGa particles embedded in a silicone matrix have been synthesized. The Villari effect has been studied depending on the size and concentration of the particles and on the magnetic state of the composite. The results indicate a decrease [...] Read more.
Magnetic composites of soft magnetic FeGa particles embedded in a silicone matrix have been synthesized. The Villari effect has been studied depending on the size and concentration of the particles and on the magnetic state of the composite. The results indicate a decrease in the Villari effect when the concentration of the magnetic particles increases. These results suggest a relationship between the Villari effect and the mechanical properties of the composites. The Young’s modulus of the composites has been obtained by microindentation and their values related to the intensity and slope of the Villari signals. The results are explained on the basis that the reduction in the cross section of the composite when submitted to stress is the main origin of the variation of the magnetic flux in the Villari effect in this kind of composite. It has also been obtained that the magnetic state of the composite plays an important role in the Villari signal. When the magnetization of the composite is greater, the magnetic flux across the composite is greater too and, so, the same reduction in the cross section originates a greater Villari signal. Full article
(This article belongs to the Special Issue Advances in Magnetic Measurements)
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14 pages, 5541 KiB  
Article
Scanning Magnetic Microscope Using a Gradiometric Configuration for Characterization of Rock Samples
by Jefferson F. D. F. Araujo, Andre L. A. Reis, Angela A. P. Correa, Elder Yokoyama, Vanderlei C. Oliveira, Jr., Leonardo A. F. Mendoza, Marcos A. C. Pacheco, Cleanio Luz-Lima, Amanda F. Santos, Fredy G. Osorio G., Giancarlo E. Brito, Wagner W. R. Araujo, Tahir, Antonio C. Bruno and Tommaso Del Rosso
Materials 2019, 12(24), 4154; https://doi.org/10.3390/ma12244154 - 11 Dec 2019
Cited by 8 | Viewed by 3045
Abstract
Scanning magnetic microscopy is a tool that has been used to map magnetic fields with good spatial resolution and field sensitivity. This technology has great advantages over other instruments; for example, its operation does not require cryogenic technology, which reduces its operational cost [...] Read more.
Scanning magnetic microscopy is a tool that has been used to map magnetic fields with good spatial resolution and field sensitivity. This technology has great advantages over other instruments; for example, its operation does not require cryogenic technology, which reduces its operational cost and complexity. Here, we presented a spatial domain technique based on an equivalent layer approach for processing the data set produced by magnetic microscopy. This approach estimated a magnetic moment distribution over a fictitious layer composed by a set of dipoles located below the observation plane. For this purpose, we formulated a linear inverse problem for calculating the magnetic vector and its amplitude. Vector field maps are valuable tools for the magnetic interpretation of samples with a high spatial variability of magnetization. These maps could provide comprehensive information regarding the spatial distribution of magnetic carriers. In addition, this approach might be useful for characterizing isolated areas over samples or investigating the spatial magnetization distribution of bulk samples at the micro and millimeter scales. This technique could be useful for many applications that require samples that need to be mapped without a magnetic field at room temperature, including rock magnetism. Full article
(This article belongs to the Special Issue Advances in Magnetic Measurements)
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8 pages, 2517 KiB  
Article
Stress Dependence of the Small Angle Magnetization Rotation Signal in Commercial Amorphous Ribbons
by Michał Nowicki
Materials 2019, 12(18), 2908; https://doi.org/10.3390/ma12182908 - 09 Sep 2019
Cited by 8 | Viewed by 2066
Abstract
The results of the investigation on tensile stress dependence of the SAMR (small angle magnetization rotation) signal in soft magnetic amorphous ribbons are presented. Exemplary results for commercially available, negatively magnetostrictive 2705M, 2714A, and 6030D amorphous ribbons show significant stress dependence, in contrast [...] Read more.
The results of the investigation on tensile stress dependence of the SAMR (small angle magnetization rotation) signal in soft magnetic amorphous ribbons are presented. Exemplary results for commercially available, negatively magnetostrictive 2705M, 2714A, and 6030D amorphous ribbons show significant stress dependence, in contrast to positively magnetostrictive 2826MB alloy. The magnetoelastic hysteresis of the obtained characteristics is compared, as well as the influence of the biasing H field and supply current variations. Based on the results, 2705M alloy with near-zero negative magnetostriction is proposed as best suited for a SAMR-based, magnetoelastic force sensor. Full article
(This article belongs to the Special Issue Advances in Magnetic Measurements)
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6 pages, 831 KiB  
Article
Stress Dependence of Seebeck Coefficient in Iron-Based Amorphous Ribbons
by Michał Nowicki
Materials 2019, 12(17), 2814; https://doi.org/10.3390/ma12172814 - 02 Sep 2019
Cited by 2 | Viewed by 2564
Abstract
The results of an investigation on tensile stress dependence of mean Seebeck coefficient in Fe-based amorphous ribbons are presented, constituting a new Seebeck-sigma effect. A measurement test stand, capable of the determination of small variations in thermopower in such materials under stress is [...] Read more.
The results of an investigation on tensile stress dependence of mean Seebeck coefficient in Fe-based amorphous ribbons are presented, constituting a new Seebeck-sigma effect. A measurement test stand, capable of the determination of small variations in thermopower in such materials under stress is described. Exemplary results for commercially available, positively magnetostrictive SA1 and 2605CO amorphous ribbons show significant stress dependence with more than 1% of relative change, in contrast to negatively magnetostrictive 6030D alloys with 0.1% change. Non-ferromagnetic alloys are tested for comparison purposes, giving negligible results. Thus, the possibility of a magnetomechanical mechanism of the stress influence is proposed. Full article
(This article belongs to the Special Issue Advances in Magnetic Measurements)
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