High-Pressure EPR Study of Spin Molecular Bistability in Li[Fe(Th-5Cl-Sa)_2]

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

Abstracts

EN

The spin transitions in Li[Fe(Th-5Cl-Sa)_2] were studied by EPR under hydrostatic pressure in the temperature range 80-332 K. The structural changes in the complex anion induced by the pressure above 350 MPa (when LS-2 phase appears) are observed, which are manifested in abrupt changes in g_{⊥} factor and linewidth ΔB_{⊥} of the low-spin phase LS. It is also manifested in the change in the shape of EPR spectrum. The high-spin ↔ low-spin transition HS ↔ LS shows hysteresis whose width is constant up to about 265 K and then rapidly increases. The spin phase diagram studied shows a large similarity to the phase diagram of (2Me-5Et-PyH)[Fe(Th-5Cl-Sa)_2], which means that characteristics of the transition depend mainly on complex anion, not on cation. The hysteresis indicates on a cooperative character of the spin transition and on grouping of the complexes in domains.

Keywords

EN

75.30.Wx; 33.35.+r; 75.50.Bb

Discipline

• 75.30.Wx: Spin crossover
• 75.50.Bb: Fe and its alloys
• 33.35.+r: Electron resonance and relaxation(see also 76.30.-v Electron paramagnetic resonance and relaxation in condensed matter)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 3
• Pages: 790-795

Dates

published

2014-08

received

2013-06-07

(unknown)

2014-04-22

Contributors

author

A. Krupska

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

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Identifiers

DOI

10.12693/APhysPolA.126.790