The magnetic-moment tag has no wiki summary.
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Do magnetic field shift away from the coil that generates it?
I read about magnetic induction communication on Lockheed Martin's wireless mining communication system
In this interview Warren Gross said:
We generate a signal and send it through a loop that's ...
6
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0answers
96 views
Nuclear Magnetic Resonance (NMR) Conceptual Questions
Let $M$ be the magnetic moment of a system. Below are the Bloch equations, including the relaxation terms.
$$\frac{\partial M_x}{\partial t}=({\bf M} \times \gamma {\bf H_0})_x-\frac{M_x}{T_2} $$
...
4
votes
1answer
515 views
Relationship between nuclear spin and nuclear magnetic moment?
We know that nuclear magnetic moment can be expressed in terms of the expected value for nuclear spin as:
$$\langle\mu\rangle =[g_lj+(g_s-g_l)\langle s_z\rangle]\frac{\mu_N}{\hbar}$$
(Cf. Krane), ...
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0answers
52 views
What's the difference between exchange spin wave and magnetostatic spin wave?
So far I've heard of three kinds of spin waves
Magnetostatic spin waves (MSW)
Dipole-exchange spin waves (DESW)
Exchange spin waves (ESW)
What's the difference?
3
votes
3answers
498 views
Is it possible to create only a magnetic wave?
I want to know if its possible to create only a magnetic field,which i can direct to a certain chosen object?
3
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2answers
142 views
Thought experiment with entangled electrons
Suppose we start out by having two entangled electrons. We separate them by some distance and we put one electron inside a thin loop of wire connected to an extremely sensitive voltage measuring ...
3
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2answers
335 views
Experimental evidence showing the kinetic energy of an electron changes in a static non-uniform magnetic field?
In a previous question, Does a magnetic field do work on an intrinsic magnetic dipole?, one highly rated answer suggested that static magnetic fields do work on intrinsic magnetic dipoles in a ...
3
votes
1answer
113 views
Why don't alpha particles have magnetic moments?
As I understand, particles such as the neutron, whilst having no external charge still possess a magnetic moment due to the underlying charges of its components.
By that logic why does the alpha ...
3
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0answers
116 views
What is the Landé g factor?
What is the Landé g factor?
I know that it gives the relation between magnetic moment and angular moment, but i wanted to know why are those magnitudes related to each other and why is the magnetic ...
2
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1answer
367 views
Magnetic moment of relativistic rotating ring
Let's consider rotating charged ring. Theoretically mass of this ring has no limit as rotation speed increases. So what about magnetic moment of the ring? Is it limited by the value of speed of ...
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vote
3answers
323 views
How do magnets work?
I've read a classbook on the field theory (including EM): it perfectly describes quantitive patterns in EM-theory, but I have no luck understanding how and why it works.
I mean, magnetic substances ...
1
vote
3answers
404 views
QM interpretation of Larmor precession
Typically when I think of a spin moment in an external field, I visualize it classically in terms of a magnetic moment precessing around the external field vector.
Now how is this described quantum ...
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0answers
90 views
In what direction does a frustrated magnetic moment get aligned?
Consider 3 layers of Ferromagnetic materials stacked on top of each other with appropriate spacer layers in between. Let the top and bottom layers be pinned to layers of Anti Ferromagnets adjacent to ...
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0answers
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What name would you give to the method of approximating an arbitrary magnet with many smaller dipoles?
Let's say I had an arbitrarily shaped permanent magnet, with total magnetic moment $M_{0}$. Ways to calculate the magnetic field of this magnet include an analytic solution (if one exists), as well ...
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0answers
458 views
Rotating Disc and Magnetic Field [closed]
I'm studying for exams, and I am curious as to how the rotation of a disc would affect the magnetic field. The following problem stumps me:
A plastic disc of radius $R$ has a charge $q$ uniformly ...
