How can there be neodymium magnets when neodymium is paramagnetic?

  • Thread starter Thread starter abdossamad2003
  • Start date Start date
  • Tags Tags
    Magnets Neodymium
AI Thread Summary
Neodymium is classified as a paramagnetic material, yet neodymium magnets are made from ferromagnetic alloys that include neodymium. This distinction explains how permanent magnets can be created despite the paramagnetic nature of pure neodymium. The discussion also touches on the differences in magnetic properties between regular steel and stainless steel, as well as the magnetic characteristics of nickel compared to the coin. Understanding these concepts clarifies the behavior of various magnetic materials. The interplay of different magnetic properties is crucial in the functionality of neodymium magnets.
abdossamad2003
Messages
68
Reaction score
4
Neodymium is a paramagnetic material, so how do we have a permanent neodymium magnet?
 
Physics news on Phys.org
Pure neodymium may be paramagnetic but neodymium magnets are ferromagnetic alloys that contain neodymium hence the name. Have you ever wondered why a permanent magnet sticks to regular steel but not to stainless steel?
 
Or why nickel is magnetic but nickles are not?
 

Thread 'Maxwell stress tensor'

This is from Griffiths' Electrodynamics, 3rd edition, page 352. I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##. In matrix form, this tensor should look like this...
View full post »
Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Thread 'Applying the Gauss (1835) formula for force between 2 parallel DC currents'

Please can anyone either:- (1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges? Or alternatively (2) point out where I have gone wrong in my method? I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula. Here is my method and results so far:- This...
View full post »

Similar threads

I Which does more work: gravitation or electromagnetism?
Replies
4
Views
1K
Can a demagnetized neodymium magnet be restored?
Replies
3
Views
3K
A Identifying Magnet Grade for FEMM Simulation: Neodymium Cylinder Magnets
Replies
5
Views
2K
B Understanding magnetic flux change during the falling of magnet
Replies
1
Views
1K
Magnet system efficiency made from neodymium magnets
Replies
5
Views
2K
Magnetization currents of Magnets with μ_r close to 1
Replies
11
Views
2K
I Magnetic field strength of a stack of magnets
Replies
7
Views
3K
Detecting Lorentz Force: Experiment with Strong Neodymium Magnet
Replies
2
Views
4K
Sudden polarity reversal in opposing permanent magnets?
Replies
6
Views
4K
I Magnet falling though copper pipe
2
Replies
59
Views
6K

Hot Threads

Recent Insights

Back
Top