Related Experiment Video
Updated: Mar 30, 2026
06:17
Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
Published on: January 16, 2020
6.2K
Magnetic Sensors Based on Amorphous Ferromagnetic Materials: A Review
Carlos Morón1, Carolina Cabrera2, Alberto Morón3
1Sensors and Actuators Group, Department of Building Technology, Polytechnic University of Madrid, 28040 Madrid, Spain. carlos.moron@upm.es.
Sensors (Basel, Switzerland)
|November 17, 2015
Summary
Amorphous ferromagnetic materials enable the creation of simple, reliable magnetic sensors. These sensors are cost-effective and suitable for harsh environments, finding use in security and automotive applications.
Area of Science:
- Materials Science
- Sensor Technology
- Applied Physics
Background:
- Magnetic sensors offer a simple, readily available technology for detecting and measuring various phenomena.
- Amorphous ferromagnetic materials are ideal for sensor construction due to their availability and cost-effectiveness.
- These materials facilitate the creation of robust, reliable sensors without requiring expensive manufacturing investments.
Purpose of the Study:
- To review the main types of magnetic sensors developed.
- To present the state-of-the-art of magnetic sensors based on amorphous ferromagnetic materials.
- To highlight the diverse applications of these sensors in modern technology.
Main Methods:
- Review of existing literature and technological advancements in magnetic sensor development.
- Analysis of the properties of amorphous ferromagnetic materials relevant to sensor applications.
- Examination of current and emerging applications of magnetic sensors.
Main Results:
- Amorphous ferromagnetic materials are highly suitable for constructing magnetic sensors.
- These sensors are cost-effective, robust, and reliable, requiring no special handling.
- The absence of electrical contact makes them ideal for harsh environments.
Conclusions:
- Magnetic sensors utilizing amorphous ferromagnetic materials represent a significant technological advancement.
- Their versatility and performance characteristics make them suitable for a wide range of applications.
- Continued development in this area promises further innovation in sensing technologies.
Keywords:
amorphous ribbonsamorphous wirebistabilityferromagnetic materialmagnetic coremagnetic sensormagnetoimpedancemagnetometersecurity systemweapon detectorsMore Related Videos
Related Concept Videos
01:31Ferromagnetism
3.5K
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...
3.5K
01:31Magnetic Susceptibility and Permeability
2.7K
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...
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...
2.7K
01:26Diamagnetism
3.4K
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....
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....
3.4K
01:27Magnetic Fields
7.8K
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
A magnetic field is defined by the force that a charged particle experiences...
7.8K
01:30Magnetism
9.9K
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
9.9K
01:30Paramagnetism
3.2K
Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...
3.2K