Spin Transition Diagram of (2Me-5Et-PyH)[Fe(Th-5Cl-Sa)_2] Studied by EPR

• Authors: A. Krupska , M. Augustyniak-Jabłokow , V. Yablokov , V. Zelentsov
• Languages of publication: EN

Abstracts

EN

The high-spin↔ low-spin transition in (2Me-5Et-PyH)[Fe(Th-5Cl-Sa)_2] was studied by EPR under hydrostatic pressure in the temperature range of 80-310 K. Two modifications of the low-spin complexes: low-pressure (LS-1) and high-pressure (LS-2) ones were revealed. The low-spin complexes are associated in domains. Under atmospheric pressure LS-1 appears or disappears at 220 K. The hydrostatic pressure shifts the transition to high temperatures. Above 410 MPa the abrupt changes of the g-factor and width Δ B of the EPR line are observed. The pressure-induced transition LS-1 ↔ LS-2 is almost independent of T up to 275 K where under pressure 420 MPa a triple point is observed. When the pressure has been decreased the reverse transition from LS-2 to LS-1 or to high spin phase (at T>260 K) occurs with a large hysteresis about 95 MPa.

Keywords

EN

76.30.-v; 33.35.+r

Discipline

• 33.35.+r: Electron resonance and relaxation(see also 76.30.-v Electron paramagnetic resonance and relaxation in condensed matter)
• 76.30.-v: Electron paramagnetic resonance and relaxation(see also 33.35.+r Electron resonance and relaxation in atomic and molecular physics; 87.80.Lg Magnetic and paramagnetic resonance in biological physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 2
• Pages: 291-296

Dates

published

2005-08

received

2005-04-24

Contributors

author

A. Krupska

• Institute of Molecular Physics, Polish Academy of Sciences, Mariana Smoluchowskiego 17, 60-179 Poznań, Poland

author

M. Augustyniak-Jabłokow

• Institute of Molecular Physics, Polish Academy of Sciences, Mariana Smoluchowskiego 17, 60-179 Poznań, Poland

author

V. Yablokov

• Institute of Molecular Physics, Polish Academy of Sciences, Mariana Smoluchowskiego 17, 60-179 Poznań, Poland

author

V. Zelentsov

• Moscow Physical Technical Institute, 141 700 Dolgoprudnii, Moscow, Russia

References

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Identifiers

DOI

10.12693/APhysPolA.108.291