Magnetic Switching: Wider or Narrower?

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Discussion Overview

The discussion revolves around the effects of the physical size (wideness) of ferromagnetic materials on their magnetic switching behavior and hysteresis loop characteristics. Participants explore how these factors influence the switching direction of magnetization in response to an applied magnetic field.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants inquire about the relationship between the physical size of ferromagnetic materials and their hysteresis loop shape.
  • There is a suggestion that the wider or narrower dimensions of the material may affect the power required to drive the material into saturation.
  • One participant questions whether the discussion is about switching speed or the shape of the hysteresis loop.
  • Another participant clarifies that the same easy axis is assumed for both samples being compared.
  • Concerns are raised about the clarity of the initial question and the need for more context regarding the experimental setup.
  • Participants discuss the implications of size on the magnetic properties, noting that larger samples may require more power to reach saturation compared to smaller samples.
  • There is a reference to a graph illustrating the hysteresis loop, prompting questions about the behavior of larger samples at specific points in the loop.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the initial question and its clarity. Multiple competing views remain about the implications of size on magnetic switching and hysteresis behavior, and the discussion does not reach a consensus.

Contextual Notes

Participants note that assumptions about the material's properties and definitions of "wideness" may affect the discussion. The relationship between physical size and magnetic behavior remains unresolved, with various interpretations presented.

kor
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For the same material, same rectangular shape and the same length,
The wider one or the narrow one will switch their magnetic direction parallel to the applied magnetic field(assuming their direction is anti parallel to the magnetic field initially )?
And Why?
 
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Can you provide a sketch of your setup?
What switches, and why?
Does your question assumes that exactly one material (?) switches its magnetic field?

I think there is some context missing here.
 
The material is ferromagnetic material.
I want to know the effect of the wideness in the hysteresis loop
 
kor said:
For the same material, same rectangular shape and the same length,
The wider one or the narrow one will switch their magnetic direction parallel to the applied magnetic field(assuming their direction is anti parallel to the magnetic field initially )?
And Why?

kor said:
The material is ferromagnetic material.
I want to know the effect of the wideness in the hysteresis loop

Sorry, your question is still not clear (at least not to me yet).

Are you asking about switching speed versus the shape of the hysteresis loop? Or some other question?

As long as you can drive the field far enough, you will switch the direction of the magnetization. In terms of speed, the μ of the magnetic material will affect its inductance when wound as an electromagnet, which can limit how fast you could drive the hysteresis loop...
 
I want to know the wideness of the material versus the shape of the hysteresis loop
 
kor said:
I want to know the wideness of the material versus the shape of the hysteresis loop

What do you mean by "wideness"? Physical size? But in your first post in this thread, you said "same shape and length"...

http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Graphics/BHCurve.gif
BHCurve.gif
 
berkeman said:
What do you mean by "wideness"? Physical size? But in your first post in this thread, you said "same shape and length"...

http://www.ndt-ed.org/EducationResources/CommunityCollege/MagParticle/Graphics/BHCurve.gif
BHCurve.gif
Yup It is the physical size. I am sorry about the misleading. I just want to say they have the same easy axis . I am sorry about that.
 
kor said:
Yup It is the physical size. I am sorry about the misleading. I just want to say they have the same easy axis . I am sorry about that.

For two samples of the same material, the physically larger one will take more power to drive into saturation. Or, given the same drive power, the smaller sample will be driven farther into saturation.

Is that what you are asking about?
 
berkeman said:
For two samples of the same material, the physically larger one will take more power to drive into saturation. Or, given the same drive power, the smaller sample will be driven farther into saturation.

Is that what you are asking about?
From the graph above, I want to ask if the external magnetic field change from the negative to positive. At Point B , the physically larger one will have a larger value ?
 

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