Magnetic field at a dipole (how many atoms surround the dipole?)

by pearapple
Tags: atoms, dipole, field, magnetic, surround
pearapple is offline
Nov27-11, 05:41 PM
P: 12
1. The problem statement, all variables and given/known data
Consider a paramagnetic material. The magnetic field generated by each dipole in the material is 1/30 T.

What is the magnetic field at a given spin, due to the presence of nearby spins?

2. Relevant equations

3. The attempt at a solution
So I need to multiply 1/30 by however many spins are nearby.

But I'm not sure how many this would be. If the paramagnetic material is in a crystal, then there are 8 dipoles around it, but there are also dipoles below and underneath it. Which ones do I count as 'nearby'? What is the total number of dipoles?

Also, I'm measuring the magnetic field at one particular dipole. So the magnetic field from that dipole doesn't count, right?
Phys.Org News Partner Science news on
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes

Register to reply

Related Discussions
Point Charges/Dipole - What is the Force/electric field/dipole moment/potential energ Introductory Physics Homework 9
Why is there no constant magnetic dipole-dipole interaction? Quantum Physics 4
dipole in a magnetic field Advanced Physics Homework 1
Nuclear magnetic resonance dipole dipole interaction Quantum Physics 0
Question about a magnetic dipole in an inhomogeneous magnetic field.Please help ASAP Advanced Physics Homework 3