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Reversible Control by Light of the High‐Spin Low‐Spin Elastic Interface inside the Bistable Region of a Robust Spin‐Transition Single Crystal
Author(s) -
Sy Mouhamadou,
Garrot Damien,
Slimani Ahmed,
PáezEspejo Miguel,
Varret François,
Boukheddaden Kamel
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201509294
Subject(s) - bistability , hysteresis , spin transition , spin crossover , condensed matter physics , spin (aerodynamics) , excitation , crystal (programming language) , materials science , amplitude , optics , optoelectronics , physics , quantum mechanics , computer science , thermodynamics , programming language
By using a weak modulated laser intensity we have succeeded in reversibly controlling the dynamics of the spin‐crossover (SC) single crystal [{Fe(NCSe)(py) 2 } 2 ( m ‐bpypz)] inside the thermal hysteresis. The experiment could be repeated several times with a reproducible response of the high‐spin low‐spin interface and without crystal damage. In‐depth investigations as a function of the amplitude and frequency of the excitation brought to light the existence of a cut‐off frequency ca. 1.5 Hz. The results not only document the applicability of SC materials as actuators, memory devices, or switches, but also open a new avenue for the reversible photo‐control of the spin transition inside the thermal hysteresis.