A first order reversal curve investigation of pressure hysteresis in multiferroics spin transition compound

Radu Tanasa (1) , Alexandru Stancu (1) , Epiphane Codjovi (2) , Jorge Linares (2) , François Varret (2) , Jean-François Létard (3)

1 Department of Solid State and Theoretical Physics
2 GEMAC - Groupe d'Etude de la Matière Condensée
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Spin crossover multiferroic [Fe(PM-BiA)2(NCS)2] is investigated for the first time with the first order reversal curve (FORC) diagram method for its hysteretic pressure behavior. The experimental setup allows the measurements of the high spin fraction as the function of temperature, light intensity, and pressure. The experimental FORC diagrams obtained in compression and releasing modes show significant differences which are in disagreement with the classical Preisach model. Also, stronger kinetic effects are evidenced in the compression mode and possible explanations of this effect considering the viscoelastic behavior are provided.

Mots clés: Ferroelectric materials; Iron compounds; Magnetic hysteresis; Magnetic transitions; Magnetisation reversal; Organic compounds; Viscoelasticity

Domaines: Matériaux; Science des matériaux [cond-mat.mtrl-sci]

Radu Tanasa, Alexandru Stancu, Epiphane Codjovi, Jorge Linares, François Varret, et al.. A first order reversal curve investigation of pressure hysteresis in multiferroics spin transition compound. Journal of Applied Physics, 2008, 103 (7), pp.07B905. ⟨10.1063/1.2831335⟩. ⟨hal-00265544⟩