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Paper Information

Title: 

A THEORETICAL INVESTIGATION OF MAGNETIC ANISOTROPY IN THE MN12 MOLECULAR MAGNET, USING QUANTUM STATISTICAL APPROACH

Type: PAPER
Author(s): CHOOPANI SAEED,HAVVAYI PARVIZ
 
 
 
Name of Seminar: IRAN PHYSICS CONFERENCE
Type of Seminar:  CONFERENCE
Sponsor:  PHYSICS SOCIETY OF IRAN
Date:  2005Volume -
 
 
Abstract: 

BY THE USE OF AN EFFECTIVE HAMILTONIAN FOR MN12 AT LOW TEMPERATURE, AND WITH THE CHANGE OF THE DIRECTION OF THE MAGNETIC FIELD WITH RESPECT TO THE CRYSTAL AXIS, THE FUNCTIONAL DEPENDENCY OF MAGNETIZATION AND THE MAGNETIC SUSCEPTIBILITY WITH RESPECT TO TEMPERATURE AND APPLIED FIELD HEVE BEEN OBTAINED, USING QUANTUM STATISTICAL APPROACH. THE OBTAINED RESULTS HAVE SHOWN THAT THE RATE OF CHANGES OF THESE TWO PARAMETERS AS A FUNCTION OF TEMPERATURE AND THE APPLIED FIELD ARE MAXIMIZED AT THE SYMMETRY AXIS. BY INCREASING THE ANGLE, REDUCTIONS ON THE PARAMETERS HAVE BEEN FOUND. ALSO, A PEAK IN THE SUSCEPTIBILITY CURVE WITH RESPECT TO TEMPERATURE HAS BEEN OBTAINED WHICH HAS ITS MAXIMUM VALUE AT THE ZERO ANGLES. THIS INVESTIGATION INTRODUCED THE CRYSTAL AXIS AS AN EASY AXIS, WHICH IS CONSISTENT WITH THE EXPERIMENTAL OBSERVATIONS.

 
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