Thermodynamic Interpretation of Pressure-Induced Spin Transitions in Thiosemicarbazonates of Iron(III)

• Authors: A. Krupska
• Languages of publication: EN

Abstracts

EN

The thermodynamic interpretation of the spin transition in iron(II) complexes taking into consideration cooperative domains is given in the literature. We use a similar interpretation for thiosemicarbazonates of aromatic aldehydes of iron(III) compounds. We extend the spin transition interpretation to pressure-induced spin transitions. The relationship between a domain size n and the interaction between a high spin and a low spin states Γp given by Gütlich et al. allows us to deduce a modified equation of the spin transition pressure p_{c} (at the temperature T=T_{c}). On the basis of this equation, the content of the fraction of the high spin state γ and of the fraction of the low-spin state, 1-γ, as a function of pressure can be theoretically estimated. The derived equation enables us to predict the width of hysteresis which refers to the high spin and low spin states formed under the high pressure as a result of the spin transition.

Keywords

EN

05.70.-a; 82.60.-s

Discipline

• 05.70.-a: Thermodynamics(see also section 64 Equations of state, phase equilibria, and phase transitions, and section 65 Thermal properties of condensed matter; for chemical thermodynamics, see 82.60.-s; for thermodynamics of plasmas, see 52.25.Kn; for thermodynamic properties of quantum fluids, see 67.25.bd, and 67.30.ef; for thermodynamics of nanoparticles, see 82.60.Qr, and 65.80.-g; for thermodynamic processes in astrophysics, see 95.30.Tg; for thermodynamics in volcanology, see 91.40.Pc)
• 82.60.-s: Chemical thermodynamics(see also 05.70.Ln Nonequilibrium and irreversible thermodynamics)

• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 124
• Issue: 4
• Pages: 626-628

Dates

published

2013-10

received

2012-10-01

(unknown)

2013-04-24

(unknown)

2013-05-16

Contributors

author

A. Krupska

• Institute of Molecular Physics, PAS, M. Smoluchowskiego 17, 60-179 Poznań, Poland

References

• [1] V.I. Shipilov, V.V. Zelentsov, V.M. Zhdanov, V.A. Turdakin, Zh. Eksp. Teor. Fiz. 19, 560 (1974) (in Russian)
• [2] A. Krupska, M.A. Augustyniak-Jabłokow, V.Yu. Yablokov, V.V. Zelentsov, Acta Phys. Pol. A 108, 291 (2005)
• [3] A. Krupska, M.A. Augustyniak-Jablokow, Yu.V. Yablokov, V.V. Zelentsov, V.A. Ulanov, J. Mrozinski, Acta Phys. Pol. A 110, 81 (2006)
• [4] M. Sorai, S. Seki, J. Phys. Chem. Solids. 35, 555 (1974)
• [5] A. Michalowicz, J. Moscovici, J. Charton, F. Sandid, F. Benamrane, Y. Garcia, J. Synchr. Rad. 8, 701 (2001)
• [6] P. Gütlich, H. Köppen, R. Link, H.G. Steinhäuser, J. Chem. Phys. 70, 3977 (1979)
• [7] V.V. Zelentsov, Yu.V. Yablokov, M. Augustyniak-Jablokow, A. Krupska, J. Mrozinski, V.A. Ulanov, Chem. Phys. 301, 15 (2004)
• [8] Yu.V. Yablokov, V.V. Zelentsov, M.A. Augustyniak-Jablokow, A. Krupska, J. Mrozinski, Mater. Sci. 21, 215 (2003)
• [9] Yu.V. Yablokov, V.V. Zelentsov, M.A. Augustyniak-Jablokow, A. Krupska, J. Mrozinski, in: Modern Problems in Condensed Matter Physics, Eds. B.Z. Malkin, Yu.N. Proshin, CJC 'Novoe Znanie' (New Knowledge), Kazan 2004, p. 367

Identifiers

DOI

10.12693/APhysPolA.124.626