Title :
Thermal hysteresis loops in spin-crossover compounds analyzed in terms of classical Preisach model
Author :
Constant-Machado, Hector ; Stancu, Alexandru ; Linarès, Jorge ; Varret, François
Author_Institution :
Versailles Univ., France
fDate :
7/1/1998 12:00:00 AM
Abstract :
We apply the classical Preisach model to reproduce the major and minor thermal hysteresis loops in the high-spin &rlarr2; low-spin transition for [Fe(bt)2(NCS)2]H2O and Fe(bt)2(NCS)2 (bt=2,2´-bi-thiazoline). For this purpose, we consider that spin transition occurs through spin domains which are characterized by the up and down switching temperatures Tα and Tβ of a square-shaped thermal hysteresis loop. For each compound, we determine a Gaussian Preisach distribution P(Tα,Tβ) which fits the experimental data
Keywords :
iron compounds; magnetic hysteresis; organic compounds; Fe(bt)2(NCS)2; Gaussian distribution; Preisach model; [Fe(bt)2(NCS)2]H2O; high-spin low-spin transition; spin domain; spin-crossover compound; switching temperature; thermal hysteresis loop; Displays; Land surface temperature; Magnetic hysteresis; Magnetic materials; Magnetic properties; Optical bistability; Paramagnetic materials; Physics; Stationary state; X-ray detection;
Journal_Title :
Magnetics, IEEE Transactions on
