The effect of the lattice expansion on high spin ⇌ low spin transitions

Spiering, H.; Meissner, Η.; Köppen, Herbert; Müller, Erwin W.; Gütlich, Philipp

doi:10.1016/0301-0104(82)85080-5

Cited by 253 publications

(126 citation statements)

References 11 publications

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“…Thus we regarded the elastic interaction between small LS and large HS molecules as the driving force of the spin transition. On this basis the lattice-expansion model (Spiering et aL, 1982;Willenbacher & Spiering, 1988;Spiering & Willenbacher, 1989) was developed, where the elastic interaction energy between HS and LS molecules is parameterized by the components of the deformation tensor, which describes the difference in strain of the lattice between the HS and the LS states. The experimental task was then to derive this deformation tensor from the temperature dependence of lattice parameters.…”

Section: Discussionmentioning

confidence: 99%

Calculation of the lattice deformation at the phase transitions of [Fe(ptz)₆](BF₄)₂from powder diffraction patterns

Wiehl¹,

Spiering²,

Gütlich³

et al. 1990

J Appl Cryst

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The thermal and light-induced high-spin (HS: 5T2g) ----low-spin (LS: IAig ) transitions of [Fe(ptz)6](BF4)2 (ptz = 1-propyltetrazole) are investigated by X-ray powder diffractometry in the range between ambient temperature and -15 K. The anisotropic lattice deformation caused by variation of the HS fraction and by temperature change was calculated directly from the differences in peak positions of the powder diagrams measured at different temperatures. An analytical expression for the dependence of peak shifts and splittings on the deformation tensor elements was derived. The differences of the lattice deformations accompanying the thermal and lightinduced spin transitions are discussed.

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Section: Discussionmentioning

confidence: 99%

Calculation of the lattice deformation at the phase transitions of [Fe(ptz)₆](BF₄)₂from powder diffraction patterns

Wiehl¹,

Spiering²,

Gütlich³

et al. 1990

J Appl Cryst

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“…We have simulated relaxation curves at various temperatures and different external pressures, assuming the elastic constants to be independent on these parameters in analogy to previous studies [21] [ Fig. 2(b)].…”

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Model for Elastic Relaxation Phenomena in Finite 2D Hexagonal Molecular Lattices

et al. 2009

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The relaxation in a spin transition compound is modeled on the basis of molecules interacting by the way of connecting springs and situated in a bidimensional open boundary hexagonal lattice. The switch of individual molecules is randomly checked using a standard Monte Carlo procedure. The switching probability depends on the energy gap between the two states in the absence of interactions and on the elongations of the nearest springs. The main characteristics of the experimental relaxation curves are reproduced and clustering and nucleation phenomena are detected

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“…The most simple model treats the cooperative effects in a meanfield approach [19,20]. This model was successfully applied to a number of systems with moderate interaction parameters [18,21,22], but its performance was less satisfactory for strongly cooperative systems showing hysteresis behaviour.…”

Section: Introductionmentioning

confidence: 99%

The interaction between the spin transition and a crystallographic phase transition in the spin-crossover compound [Fe(bbtr)3](ClO4)2: Nucleation, formation of domains and fluctuations

Krivokapic

Enachescu

Bronisz

et al. 2008

Inorganica Chimica Acta

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a b s t r a c tThe thermal and the light-induced spin transition in [Fe(bbtr) 3 ](ClO 4 ) 2 (bbtr = 1,4-di(1,2,3-triazol-1-yl)) as well as the high-spin ? low-spin relaxation following the light-induced population of the high-spin state below the thermal transition temperature are discussed in relation to the accompanying crystallographic phase transition. The experimental data have exclusively been obtained using optical single crystal absorption spectroscopy.

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The effect of the lattice expansion on high spin ⇌ low spin transitions

Cited by 253 publications

References 11 publications

Calculation of the lattice deformation at the phase transitions of [Fe(ptz)₆](BF₄)₂from powder diffraction patterns

Calculation of the lattice deformation at the phase transitions of [Fe(ptz)₆](BF₄)₂from powder diffraction patterns

Model for Elastic Relaxation Phenomena in Finite 2D Hexagonal Molecular Lattices

The interaction between the spin transition and a crystallographic phase transition in the spin-crossover compound [Fe(bbtr)3](ClO4)2: Nucleation, formation of domains and fluctuations

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The effect of the lattice expansion on high spin ⇌ low spin transitions

Cited by 253 publications

References 11 publications

Calculation of the lattice deformation at the phase transitions of [Fe(ptz)6](BF4)2from powder diffraction patterns

Calculation of the lattice deformation at the phase transitions of [Fe(ptz)6](BF4)2from powder diffraction patterns

Model for Elastic Relaxation Phenomena in Finite 2D Hexagonal Molecular Lattices

The interaction between the spin transition and a crystallographic phase transition in the spin-crossover compound [Fe(bbtr)3](ClO4)2: Nucleation, formation of domains and fluctuations

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Product

Resources

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Calculation of the lattice deformation at the phase transitions of [Fe(ptz)₆](BF₄)₂from powder diffraction patterns

Calculation of the lattice deformation at the phase transitions of [Fe(ptz)₆](BF₄)₂from powder diffraction patterns