Excited metastables electronic spin states in spin crossover compounds studies by atom-phonon coupling model: Gradual and two-step transition cases

2010 ◽  
Vol 107 (9) ◽  
pp. 09A959 ◽  
Author(s):  
A. Gindulescu ◽  
A. Rotaru ◽  
J. Linares ◽  
M. Dimian ◽  
J. Nasser
Keyword(s):  
Spin Crossover ◽  
Coupling Model ◽  
Spin States ◽  
Phonon Coupling ◽  
Electronic Spin ◽  
Step Transition

Re-entrance phase and excited metastable electronic spin states in one-dimensional spin crossover compounds explained by atom-phonon coupling model

2009 ◽  
Vol 106 (4) ◽  
pp. 043507 ◽  
Author(s):  
Aurelian Rotaru ◽  
Jorge Linares ◽  
Sebastien Mordelet ◽  
Alexandru Stancu ◽  
Jamil Nasser
Keyword(s):  
Spin Crossover ◽  
Coupling Model ◽  
Spin States ◽  
Phonon Coupling ◽  
One Dimensional ◽  
Electronic Spin

Metastable states at low temperature in spin crossover compounds in the framework of the atom-phonon coupling model

Polyhedron ◽  
2011 ◽  
Vol 30 (18) ◽  
pp. 3186-3188 ◽  
Author(s):  
A. Gindulescu ◽  
A. Rotaru ◽  
J. Linares ◽  
M. Dimian ◽  
J. Nasser
Keyword(s):  
Low Temperature ◽  
Spin Crossover ◽  
Coupling Model ◽  
Metastable States ◽  
Phonon Coupling

Analysis of spin crossover nanochains using parabolic approximation in the framework of atom–phonon coupling model

2015 ◽  
Vol 476 ◽  
pp. 61-70 ◽  
Author(s):  
D. Chiruta ◽  
C.-M. Jureschi ◽  
J. Linares ◽  
J. Nasser ◽  
A. Rotaru
Keyword(s):  
Spin Crossover ◽  
Coupling Model ◽  
Phonon Coupling ◽  
Parabolic Approximation

Monte Carlo simulations for 1- and 2D spin crossover compounds using the atom–phonon coupling model

Polyhedron ◽  
2009 ◽  
Vol 28 (9-10) ◽  
pp. 1684-1687 ◽  
Author(s):  
Aurelian Rotaru ◽  
Adrian Carmona ◽  
Flavien Combaud ◽  
Jorge Linares ◽  
Alexandru Stancu ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Spin Crossover ◽  
Coupling Model ◽  
Phonon Coupling

Size and pressure effects in the atom-phonon coupling model for spin crossover compounds

2008 ◽  
Vol 103 (7) ◽  
pp. 07B908 ◽  
Author(s):  
Aurelian Rotaru ◽  
Jorge Linares ◽  
Epiphane Codjovi ◽  
Jamil Nasser ◽  
Alexandru Stancu
Keyword(s):  
Spin Crossover ◽  
Coupling Model ◽  
Pressure Effects ◽  
Phonon Coupling

scholarly journals Simulations of Edge Effect in 1D Spin Crossover Compounds by Atom-Phonon Coupling Model

2016 ◽  
Vol 738 ◽  
pp. 012052
Author(s):  
J Linares ◽  
D Chiruta ◽  
C M Jureschi ◽  
Y Alayli ◽  
C O Turcu ◽  
...  
Keyword(s):  
Edge Effect ◽  
Spin Crossover ◽  
Coupling Model ◽  
Phonon Coupling

Phase diagram of two-dimensional spin crossover systems using the atom-phonon coupling model

2011 ◽  
Vol 109 (7) ◽  
pp. 07B102 ◽  
Author(s):  
M. Paez Espejo ◽  
A. Gîndulescu ◽  
J. Linares ◽  
J. Nasser ◽  
M. Dimian
Keyword(s):  
Phase Diagram ◽  
Spin Crossover ◽  
Coupling Model ◽  
Two Dimensional ◽  
Phonon Coupling

scholarly journals Analysis of phase transitions in spin-crossover compounds by using atom – phonon coupling model

2011 ◽  
Vol 268 ◽  
pp. 012007 ◽  
Author(s):  
A Gîndulescu ◽  
A Rotaru ◽  
J Linares ◽  
M Dimian ◽  
J Nasser
Keyword(s):  
Phase Transitions ◽  
Spin Crossover ◽  
Coupling Model ◽  
Phonon Coupling

scholarly journals Solvent-Induced Hysteresis Loop in Anionic Spin Crossover (SCO) Isomorph Complexes

2021 ◽  
Vol 7 (6) ◽  
pp. 75
Author(s):  
Emmelyne Cuza ◽  
Samia Benmansour ◽  
Nathalie Cosquer ◽  
Françoise Conan ◽  
Carlos J. Gómez-García ◽  
...  
Keyword(s):  
Metal Ion ◽  
Spin Crossover ◽  
Magnetic Behaviour ◽  
Magnetic Studies ◽  
Tridentate Ligands ◽  
Tripodal Ligand ◽  
Single Crystal Structures ◽  
One Step ◽  
Lower Temperature ◽  
Step Transition

Reaction of Fe(II) with the tris-(pyridin-2-yl)ethoxymethane (py3C-OEt) tripodal ligand in the presence of the pseudohalide ancillary NCSe- (E = S, Se, BH3) ligand leads to the mononuclear complex [Fe(py3C-OEt)2][Fe(py3C-OEt)(NCSe)3]2·2CH3CN (3), which has been characterised as an isomorph of the two previously reported complexes, Fe(py3C-OEt)2][Fe(py3C-OEt)(NCE)3]2·2CH3CN, with E = S (1), BH3 (2). X-ray powder diffraction of the three complexes (1–3), associated with the previously reported single crystal structures of 1–2, revealed a monomeric isomorph structure for 3, formed by the spin crossover (SCO) anionic [Fe(py3C-OEt)(NCSe)3]− complex, associated with the low spin (LS) [Fe(py3C-OEt)2]2+ cationic complex and two solvent acetonitrile molecules. In the [Fe(py3C-OEt)2]2+ complex, the metal ion environment involves two py3C-OEt tridentate ligands, while the [Fe(py3C-OEt)(NCSe)3]− anion displays a hexacoordinated environment involving three N-donor atoms of one py3C-OEt ligand and three nitrogen atoms arising from the three (NCSe)− coligands. The magnetic studies for 3 performed in the temperature range 300-5-400 K, indicated the presence of a two-step SCO transition centred around 170 and 298 K, while when the sample was heated at 400 K until its complete desolvation, the magnetic behaviour of the high temperature transition (T1/2 = 298 K) shifted to a lower temperature until the two-step behaviour merged with a gradual one-step transition at ca. 216 K.

Interplay between spin crossover and exchange interaction in iron(III) complexes

2009 ◽  
Vol 81 (8) ◽  
pp. 1357-1383 ◽  
Author(s):  
Roman Boča ◽  
Ivan Nemec ◽  
Ivan Šalitroš ◽  
Ján Pavlik ◽  
Radovan Herchel ◽  
...  
Keyword(s):  
Experimental Data ◽  
Magnetic Susceptibility ◽  
Exchange Interaction ◽  
Spin Crossover ◽  
Magnetic Measurements ◽  
Spin States ◽  
Magnetic Exchange Interaction ◽  
Magnetic Exchange ◽  
Simultaneous Fitting ◽  
Polynuclear Metal Complexes

In the dinuclear and polynuclear metal complexes exhibiting the low-spin (LS) to high-spin (HS) transition, the spin-crossover phenomenon interferes with the magnetic exchange interaction. The latter manifests itself in forming spin-multiplets, which causes a possible overlap of the band originating in different reference spin states (LL, LH, HL, and HH). A series of dinuclear Fe(III) complexes has been prepared; the iron centers are linked by a bidentate bridge (CN-, and diamagnetic metallacyanates {Fe(CN)5(NO)}, {Ni(CN)4}, {Pt(CN)4}, and {Ag(CN)2}). Magnetic measurements confirm that the spin crossover proceeds on the thermal propagation. This information has been completed also by the Mössbauer spectral (MS) data. A theoretical model has been developed that allows a simultaneous fitting of all available experimental data (magnetic susceptibility, magnetization, HS mole fraction) on a common set of parameters.

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