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Related Concept Videos

Ferromagnetism01:31

Ferromagnetism

2.9K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Diamagnetism01:26

Diamagnetism

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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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Magnetic Susceptibility and Permeability01:31

Magnetic Susceptibility and Permeability

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In linear magnetic materials, like paramagnets and diamagnets, magnetization is proportional to the magnetic field intensity. The constant of proportionality, a dimensionless number, is called magnetic susceptibility. The value of the susceptibility depends on the type of material.
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

4.2K
Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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Magnetic Field Due To A Thin Straight Wire01:28

Magnetic Field Due To A Thin Straight Wire

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
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Related Experiment Video

Updated: Dec 26, 2025

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
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Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

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A magnetic sensor using a 2D van der Waals ferromagnetic material.

Valery Ortiz Jimenez1, Vijaysankar Kalappattil1, Tatiana Eggers1

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

Scientific Reports
|March 18, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel magnetic sensor using two-dimensional (2D) van der Waals ferromagnetic VSe2 films. This highly sensitive sensor demonstrates significant potential for advanced spintronic nanodevices and magnetic information storage.

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Last Updated: Dec 26, 2025

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Two-dimensional (2D) van der Waals ferromagnetic materials are crucial for next-generation spintronic nanodevices, nanosensors, and data storage.
  • Single-layer VSe2 exhibits strong room-temperature ferromagnetism, presenting new avenues for ultrathin magnetic applications.

Purpose of the Study:

  • To introduce a novel magnetic sensor design.
  • To leverage single-layer VSe2 as a highly sensitive magnetic core for the sensor.
  • To evaluate the sensor's performance and sensitivity.

Main Methods:

  • Fabrication of a magnetic sensor utilizing a single-layer VSe2 film.
  • Integration of the VSe2 film into an LC circuit with a soft ferromagnetic microwire coil.
  • Measurement of the sensor's resonance frequency changes under applied DC magnetic fields.

Main Results:

  • The sensor demonstrated high sensitivity, defined as df0/dH, where f0 is the resonance frequency and H is the external magnetic field.
  • The achieved sensitivity reached a notable value of 16 × 10^6 Hz/Oe.
  • The VSe2-based sensor showed significant response to external magnetic fields.

Conclusions:

  • The developed VSe2-based magnetic sensor exhibits exceptional sensitivity.
  • This technology holds promise for diverse magnetic sensing applications.
  • Single-layer VSe2 is a viable material for advanced magnetic sensing components.