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Related Concept Videos

The Hall Effect01:30

The Hall Effect

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Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
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Diamagnetism01:26

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Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
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Updated: Aug 8, 2025

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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Enhanced Magnetism and Anomalous Hall Transport through Two-Dimensional Tungsten Disulfide Interfaces.

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  • 1Department of Physics, University of South Florida, Tampa, FL 33620, USA.

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|February 25, 2023
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Summary

The magnetic proximity effect in 2D transition metal dichalcogenide/ferromagnet heterostructures was investigated. WS2 flakes influenced magnetization differently above and below the Verwey transition temperature, revealing interfacial ferromagnetic coupling.

Keywords:
iron oxidemagnetic proximity effecttwo-dimensional materials

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • The magnetic proximity effect (MPE) is crucial for manipulating interfacial properties in 2D transition metal dichalcogenide (TMD)/ferromagnet heterostructures.
  • Understanding the temperature and magnetic field evolution of MPE in these systems is essential for spintronics and valleytronics applications.

Purpose of the Study:

  • To investigate the MPE in Pt/WS2/BPIO heterostructures.
  • To understand the temperature-dependent magnetic and transport properties of these systems.

Main Methods:

  • Magnetometry, four-probe resistivity, and anomalous Hall effect (AHE) measurements were used.
  • Density functional theory (DFT) calculations complemented experimental findings.

Main Results:

  • Monolayer WS2 reduced BPIO magnetization above ~120 K (Verwey transition temperature) but enhanced it below.
  • AHE measurements indicated ferromagnetic coupling at the WS2/BPIO interface at lower temperatures.

Conclusions:

  • The study provides foundational understanding of MPE in 2D TMD/magnet heterostructures.
  • Findings pave the way for designing novel heterostructures for spintronics, opto-spincaloritronics, and valleytronics.