A High Sensitivity Custom-Built Vibrating Sample Magnetometer

Phillips, Jared Paul; Yazdani, Saeed; Highland, Wyatt; Cheng, Ruihua

doi:10.3390/magnetochemistry8080084

Cited by 6 publications

(2 citation statements)

References 19 publications

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“…Magnetic coupling between two ferromagnets, a soft phase Fe and a hard phase Nd-Fe-B primarily in the Nd 2 Fe 14 B phase, was systematically studied using a house-developed vibrating sample magnetometer (VSM) [43], and the crystalline structure was investigated using 1-D X-ray diffraction (XRD, Bruker AXS D8 Discover A25, Karlsruhe, Germany). The details of the in-house developed VSM can be found elsewhere [43]. All samples were grown via DC magnetron sputtering in a high vacuum environment.…”

Section: Resultsmentioning

confidence: 99%

Study of the Long-Range Exchange Coupling in Nd-Fe-B/Ti/Fe Multilayered Structure

Yazdani,

Phillips,

Mosey

et al. 2024

Crystals

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The exchange coupling between two ferromagnetic thin films, one with magnetically hard and the other with soft phases, separated by a thin non-magnetic layer, is studied. Nd-Fe-B/Ti/Fe thin film heterostructures were fabricated using DC magnetron sputtering on Si substrates, which were heated in situ at 650 °C using a house-built vacuum-compatible heater. The effect of the thickness of the Ti buffer layer and the annealing temperature on the formation of various phases of Nd-Fe-B was investigated. The effect of the thickness of the non-magnetic Ti spacer layer on the exchange coupling strength between the hard phase Nd-Fe-B ferromagnetic thin layer and the soft phase transition metal Fe layer was experimentally investigated. Hysteresis loops of multilayer thin films indicate an antiferromagnetic coupling was observed when the thickness of the spacer layer was 2 nm. This is within the range of an antiferromagnetic coupling calculation based on RKKY theory predictions.

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Section: Resultsmentioning

confidence: 99%

Study of the Long-Range Exchange Coupling in Nd-Fe-B/Ti/Fe Multilayered Structure

Yazdani,

Phillips,

Mosey

et al. 2024

Crystals

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“…There are several reasons for adopting this method here. First, sample geometry and material composition: the vibrating sample magnetometer technique [30] poses challenges for our specific sample types, which consist of either powder or viscous magnetic composites. Utilizing a vibrating sample magnetometer could potentially alter the intrinsic structure of these materials, thereby compromising the integrity of our results.…”

Section: Structural Elemental and Magnetic Characterization Of Iron O...mentioning

confidence: 99%

Passive Electrical Components Based on Cotton Fabric Decorated with Iron Oxides Microfibers: The Influence of Static and Pulsed Magnetic Fields on the Equivalent Electrical Properties

Bica,

Anitas,

Choi

et al. 2023

Micromachines

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In this work, environmentally friendly and low-cost passive electrical components (PECs) are manufactured based on composites consisting of cotton fabrics soaked with solutions of silicone oil and different amounts of iron oxides microfibers (μFe). The μFe consists of a mixture of three phases: hematite (α-Fe2O3), maghemite (γ-Fe2O3), and magnetite (Fe3O4). The equivalent electrical capacitance (Cp) and resistance (Rp) of PECs are measured as a function of magnetic flux density B in a static and pulsed magnetic field superimposed on an alternating electric field of frequency 1 kHz. The relative variation in the hysteresis curves for both Cp and Rp are obtained by measuring them in the ascending and then the descending mode of B. We show that all these three quantities are sensibly influenced by the volume fractions of μFe and by the values of B. The main influence on this behavior is attributed to the semiconductor properties of the α-Fe2O3 and γ-Fe2O3 components of the oxide microfibers. In addition, it is found that at B≃ 175 mT, the maximum relative variance of the hysteresis curve is about 3.35% for Cp and 3.18 % for Rp. When a pulsed magnetic field is used, it is shown that Cp and Rp closely follow the variation in the magnetic field. Thus, the resulting electrical properties of PECs, together with the fast response to the application of pulsed magnetic fields, make them useful in the fabrication of various devices, such as electric, magnetic, and deformation fields, or mechanical stress sensors with applications in protection against electromagnetic smog, healthcare monitoring, or for human–machine interfacing.

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Molecularly Imprinted Polymers: Cutting-Edge Characterization Strategies

İlktaç

2024

Molecularly Imprinted Polymers as Artificial Antibodies for the Environmental Health

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A High Sensitivity Custom-Built Vibrating Sample Magnetometer

Cited by 6 publications

References 19 publications

Study of the Long-Range Exchange Coupling in Nd-Fe-B/Ti/Fe Multilayered Structure

Study of the Long-Range Exchange Coupling in Nd-Fe-B/Ti/Fe Multilayered Structure

Passive Electrical Components Based on Cotton Fabric Decorated with Iron Oxides Microfibers: The Influence of Static and Pulsed Magnetic Fields on the Equivalent Electrical Properties

Molecularly Imprinted Polymers: Cutting-Edge Characterization Strategies

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