Square-lattice antiferromagnet subjected to a magnetic field aligned with the order parameter
Square-lattice antiferromagnet subjected to a magnetic field aligned with the order parameter
The thermal properties of antiferromagnetic films -in particular, the square-lattice antiferromagnet -subjected to an external magnetic field pointing into the direction of the staggered magnetization are explored.The effective field theory analysis of the free energy density is carried out to two-loop order.While the emphasis is on finite temperature, we also …