Programme

O.12 -- Oral, NCTP-39

Date: Wednesday, 30-07-2014

Time: 09h00 - 09h20

Properties of a monolayer magnetic film with dipolar interaction

Bach Thanh Cong, Pham Huong Thao, Bach Huong Giang, Nguyen Thuy Trang

Computational Materials Science laboratory, Faculty of Physics, VNU University of Science

Thermodynamic properties of the monolayer Heisenberg spin lattice film in the external field, and with the nearest neighbor exchange, single ion anisotropy, dipolar interaction are calculated using functional integral representation for free energy. This interacting spin lattice reduces to the non-diagonal anisotropic exchange Heisenberg model and magnetic properties of which such as magnetization, Curie temperature are obtained in Gaussian approximation. Competition between the external field and different kind of interactions leads to the spin-reorientation effect at the critical field strength which is calculated numerically. Comparison with other methods is also discussed.

Presenter: Bach Thanh Cong