Question on Magnetic polarization

In summary, magnetic polarization is the process by which a material becomes magnetized. It occurs when the magnetic moments of individual atoms within a material align in the same direction, creating a net magnetic field. This process is triggered by placing the material in a magnetic field. The strength of the magnetic field, type of material, and temperature can all affect the degree of polarization. Some applications of magnetic polarization include data storage, medical diagnostics, and electronic devices. Magnetic polarization is measured using a device called a magnetometer, typically in units of magnetic flux density.
  • #1
arlo
3
0
Question on Magnetic polarization

Is it possible to hear/record the sound created by the shifting of the alignment of magnetic dipoles when introduced to an external magnetic field?

I believe that for some materials, this shifting causes friction which in return produces sound. Has anyone done this before?
 
Physics news on Phys.org
  • #2
Once I saw (or rather heard) an experiment on this topic. If I understand it right, you don't have to wait for dipoles to cause mechanical vibrations. With a microphone you can get sound directly from moving dipoles, because they cause changing magnetic field which induces voltage in the microphone.
 
  • #3


I can say that it is possible to hear and record the sound created by the shifting of magnetic dipoles when introduced to an external magnetic field. This phenomenon is known as magnetostriction, where the change in magnetic polarization causes a change in the shape and size of the material. This change in shape can produce vibrations and sound waves that can be detected and recorded. This has been studied and utilized in various fields, such as in the development of sensitive magnetic sensors and in the creation of musical instruments like the magnetostrictive piano. However, the amount of sound produced may vary depending on the material and the strength of the external magnetic field. Further research and experimentation may be needed to fully understand and utilize this phenomenon.
 

FAQ: Question on Magnetic polarization

What is magnetic polarization?

Magnetic polarization is the process by which a material becomes magnetized. It occurs when the magnetic moments of individual atoms within a material align in the same direction, creating a net magnetic field.

How does magnetic polarization occur?

Magnetic polarization occurs when a material is placed in a magnetic field. The magnetic field causes the magnetic moments of the atoms within the material to align, resulting in a net magnetic field.

What factors affect magnetic polarization?

The factors that affect magnetic polarization include the strength of the magnetic field, the type of material, and the temperature. A stronger magnetic field, ferromagnetic materials, and lower temperatures typically result in a higher degree of polarization.

What are some applications of magnetic polarization?

Magnetic polarization has various applications, including data storage in hard drives, magnetic resonance imaging (MRI) in medical diagnostics, and magnetic sensors in electronic devices. It is also used in the production of magnetic materials and in the study of the Earth's magnetic field.

How is magnetic polarization measured?

Magnetic polarization is measured using a device called a magnetometer, which can detect the strength and direction of a magnetic field. The degree of polarization is typically measured in units of magnetic flux density, such as tesla or gauss.

Similar threads

Back
Top