All Questions
6
questions
0
votes
1
answer
35
views
Internally, what defines whether a material is magnetically hard or soft?
I know that magnetically hard materials hold magnetic fields (magnetic moment alignment) for longer, while soft metals do not. However, what, internally, causes these properties to arise?
- 185
1
vote
0
answers
19
views
Qualitatively, how would you model the electron in a Penning trap quantum mechanically?
I know there are articles that give a full treatment of the math, but I'm more interested in the concept. I get that, in the classical picture, we are measuring the oscillation frequency of the ...
- 2,475
0
votes
1
answer
188
views
Is the electron spin $g$-factor value implying the particle is a composite one?
As I understood the highest possible value for a magnetic moment of a point charge having the same amount of charge as an electron and rotating with same electron velocity and confined in the same ...
- 2,255
1
vote
0
answers
415
views
How do magnetic dipoles align with external magnetic fields?
Based on the equation for energy of a magnetic dipole in an external field:
$$E=-\mu \cdot B$$ I would have thought that the system would minimise its potential energy and so the $\mu $ will be ...
- 1,525
3
votes
1
answer
780
views
Point particle with a magnetic dipole?
I have read these questions:
Are contravariant basis vectors and basis 1-forms identical?
Where John Rennie's answer says that electrons do have an electric dipole moment and we imagine that in math ...
- 29k
4
votes
2
answers
404
views
Why are materials magnetic?
I have trouble understanding why some materials are magnetic. What I know so far, is that electrons are the main reason. Every single electron has a magnetic moment, which is defined as the torque it ...
- 357