Special features of "neel"
You may also want to look at the full parameter list of all the buttons and sliders, or at one of the general help files, Sliders, or
Graphs.
- KEY EQUIVALENTS
- run/stop: press the spacebar.
- initialize use the i-key or make a selection from the initial conditions menu.
- UNITS
-
None of the input parameters has units given. As with ALL of our
simulations, the computer ALWAYS works with numbers, never with
coulombs, meters or seconds. Here, as in "ising" the relevant
parameters may be thought of as energies (if multiplied by appropriate
constants) and we ask you to think in the computer's language. The behavior of the system depends only upon their RELATIVE
values, not their absolute value. In "ising" we took J as the
reference standard. Here we play no favorites!
- MANUAL SPIN FLIPS
- You can flip a spin manually at any time by clicking on it or dragging slowly across it with the
cursor.
- THE DIPOLAR INTERACTION
-
For "easy axis" perpendicular and "int_power" at 3, the interaction
energy of two parallel spins separated by r is +D(a/r)^3. For "easy
axis" "vertical" or "horizontal" and "int_power" set to 2, the energy
for parallel spins is -D[cos(2*theta)](a/r)^2 where theta is the angle
between the easy axis and the vector connecting the spins.
- GRAPH RESET
- Reset the graph AFTER changing the initial conditions, not before, if the first point is of interest.