https://doi.org/10.1140/epjb/e2015-60340-x
Regular Article
On the origin of multi-step spin transition behaviour in 1D nanoparticles
1 GEMaC, Université de Versailles
Saint-Quentin-en-Yvelines, CNRS-UVSQ (UMR 8635), 78035
Versailles Cedex,
France
2 Faculty of Electrical Engineering and
Computer Science &MANSiD, Stefan cel Mare University,
720229
Suceava,
Romania
3 LISV, Université de Versailles
Saint-Quentin-en-Yvelines, 78140
Velizy,
France
4 LATMOS, Université de
Versailles-Saint-Quentin-en-Yvelines, Sorbonne Universités, CNRS-UMR 8190,
78280
Guyancourt,
France
5 Institute of Condensed Matter and
Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université Catholique de
Louvain, Place L. Pasteur
1, 1348
Louvain-la-Neuve,
Belgium
a e-mail: jorge.linares@uvsq.fr
Received:
29
April
2015
Received in final form:
20
July
2015
Published online:
21
September
2015
To investigate the spin state switching mechanism in spin crossover (SCO) nanoparticles, a special attention is given to three-step thermally induced SCO behavior in 1D chains. An additional term is included in the standard Ising-like Hamiltonian to account for the border interaction between SCO molecules and its local environment. It is shown that this additional interaction, together with the short range interaction, drives the multi-steps thermal hysteretic behavior in 1D SCO systems. The relation between a polymeric matrix and this particular multi-step SCO phenomenon is discussed accordingly. Finally, the environmental influence on the SCO system’s size is analyzed as well.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2015