Commit JT 112719

where si and sj are two neighboring magnetic spins of two particles,

rij = |ri - rj| is the inter-atomic distance between the two

particles. The summation is over pairs of nearest neighbours. 

particles. The summation is over pairs of nearest neighbors. 

J(rij) is a function defining the intensity and the sign of the exchange

interaction for different neighboring shells. This function is defined as:

* integrating the equations of motion for the coupled spin-lattice system

* implementing magnetic pair interactions and magnetic forces

* thermostating and applying a transverse damping to the magnetic spins

* minimizing spin configurations with an adaptive timestep scheme

* performing geodesic NEB calculations

* computing and outputing magnetic quantities

* minimizing the energy or total torque of a magnetic system