1 / 14

By Naim A. Malak Physics Department An-Najah National University, Nablus, Palestine

The Magnetic Properties of the Anti-collinear Phase under the Effects of a Uniform External Magnetic Field in a Two Dimensional Square Planar System. By Naim A. Malak Physics Department An-Najah National University, Nablus, Palestine 7- 8 / May / 2007 Supervised by

urielle-horton
Download Presentation

By Naim A. Malak Physics Department An-Najah National University, Nablus, Palestine

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Magnetic Properties of the Anti-collinear Phase under the Effects of a Uniform External Magnetic Field in a Two Dimensional Square Planar System By Naim A. Malak Physics Department An-Najah National University, Nablus, Palestine 7- 8 / May / 2007 Supervised by Dr. Abdel-Ruhman M. Abu-Labdeh

  2. Outline Aim The Model in General Terms Monte Carlo Method Results Summary

  3. Aim To investigate the magnetic properties of the Anti-collinear Phase under the effects of a Uniform External Magnetic Field in an Anti-ferromagnetic Dipolar Planar System

  4. The Model in General Terms Where a set of two dimensional classical vectors of unit magnitude g : the strength of the dipolar interaction h : the strength of uniform external magnetic field parallel to X-axis J : the strength of the exchange interaction ( J< 0 )

  5. Monte Carlo Method • Constructing an infinite plane from replicas of a finite system • Using the Ewald Summation Technique • Using the slandered Metropolis Algorithm

  6. Results

  7. Spin Configurations at T=0.1,h=0.1Anti-collinear Phase

  8. Spin Configurations Perpendicular to the applied Field ( Dipolar Anti-ferromagnetic Phase )

  9. Spin Configurations at low T and high field Ferromagnetic Phase ( T=0.1, h=8.0 )

  10. Summary • The Phase Diagram Confirms The following results: * First Order Transition from the Dipolar Anti-ferromagnetic Phase to Ferromagnetic Phase * Second Order Transition from the Dipolar Anti-ferromagnetic Phase to Paramagnetic Phase • Besides that, Simulation Results exhibit stable (pi/4) spin configurations at very low ( field & temperature

  11. Acknowledgments • My father • Dr. Abdel-Ruhman M. Abu Labdeh for supervision • My friends; for help

More Related