Molecular spin alignment having macro torque effects?

In summary, the conversation discusses the possible macro effect of aligning electron or nuclear spins in a magnetic field, specifically if it could cause a rod to rotate. The creator mentions the Einstein-de Haas effect, where magnetization occurs due to mechanical rotation, and the Barnett effect, where magnetization occurs along the rotational axis. A link to a relevant source is provided.
  • #1
xerxes73
10
0
Hello,

If a magnetic field aligns the electron or nuclear spins can that have a macro effect of causing torque? So for example if we had a rod and we fixed one end but allowed it to freely rotate and then aligned electron or nuclear spins would that cause the rod to rotate?

Thanks,
Xerxes73
 
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  • #3
And the opposite effect is the Barnett effect, whereby mechanical rotation of a ferromagnetic body on its axis results in magnetization along the rotational axis.

http://prola.aps.org/abstract/PR/v6/i4/p239_1

Creator
 
Last edited:
  • #4
Thanks! I appreciate the info. This led to some interesting reading. -Xerxes73
 

Related to Molecular spin alignment having macro torque effects?

1. What is molecular spin alignment and how does it affect macro torque effects?

Molecular spin alignment refers to the orientation of the spins of individual molecules in a material. When these spins are aligned in a specific direction, it can result in a macro torque effect, which is the overall torque or rotational force experienced by the material as a whole.

2. How is molecular spin alignment achieved?

Molecular spin alignment can be achieved through various methods such as applying an external magnetic field, using light or electrical fields, or through interactions with other molecules in the material.

3. What are some potential applications of molecular spin alignment and macro torque effects?

Molecular spin alignment and macro torque effects have potential applications in areas such as spintronics, magnetic data storage, and quantum computing. They can also be used to study the properties of materials and to create new materials with unique properties.

4. Can molecular spin alignment and macro torque effects be controlled?

Yes, molecular spin alignment and macro torque effects can be controlled through various methods such as adjusting the strength and direction of an external magnetic field, changing the temperature or pressure of the material, or using different types of molecules.

5. Are there any challenges or limitations to using molecular spin alignment and macro torque effects?

One challenge is controlling the alignment of individual molecules in a material, as it requires precise control and manipulation at the nanoscale. Additionally, the effects may only be observed at very low temperatures or in specific types of materials.

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