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Browsing by Author "-Machado H.C."

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Static and light induced hysteresis in spin-crossover compounds: Experimental data and application of Preisach-type models

(Elsevier, 2001-01-01)
Enachescu C.
;
-Machado H.C.
;
Menendez N.
;
Codjovi E.
;
LINARES GALVEZ, JORGE EDWING
;
Varret F.
;
Stancu A.

Preisach-type models were used to analyze static and light induced hysteresis exhibited by spin transition compounds. Magnetic and reflectivity measurements were performed on spin-crossover solid solutions. Analysis suggested that photo-stationary instability due to competition between photo-excitation and non-exponential relaxation of light populated metastable state resulted in light induced thermal hysteresis. Experimental results indicated that frequent defaults obtained from the solutions resulted in inhomogeneous composition of Fe/Co in the crystal.