Softening of the elasticity tensor of Na2[Fe(CN)5NO] · 2H2O upon generation of metastable electronic states by irradiation with light

Lüghausen, K.; Siegert, H.; Woike, Th.; Haussühl, S.

doi:10.1016/0022-3697(95)00048-8

Cited by 8 publications

(4 citation statements)

References 15 publications

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“…101 Owing to their organic content and magnetic metal atoms, these materials can change their structural arrangements under light leading to the change in the magnetic state. The generally accepted mechanism of photostriction here is a light sensitive electronic subsystem that intrinsically lead to the change in the bond configuration to form another metastable structure with different elastic, 102 optical, and magnetic properties. 103 In the representative iron (II) molecular complexes [Fe(phen) 2 (NCS) 2 ], for example, the photostriction happens together with a change in magnetic properties and can reach volumetric change of 1.1% at 30 K (Ref.…”

Section: Spin-crossover Molecular Crystalsmentioning

confidence: 99%

Photostrictive materials

Kundys

2015

Applied Physics Reviews

140

128

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Light-matter interactions that lead to nonthermal changes in size of the sample constitute a photostrictive effect in many compounds. The photostriction phenomenon was observed in four main groups of materials, ferroelectrics, polar, and non-polar semiconductors, as well as in organic-based materials that are reviewed here. The key mechanisms of photostriction and its dependence on several parameters and perturbations are assessed. The major literature of the photostriction is surveyed, and the review ends with a summary of the proposed technical applications.Comment: Photostriction review, Photostrictive materials are summarized, Photostrictive efficiency is described, 13 page

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Section: Spin-crossover Molecular Crystalsmentioning

confidence: 99%

Photostrictive materials

Kundys

2015

Applied Physics Reviews

140

128

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“…[17][18][19]). For our measurements we employed a device similar to that already used in an earlier study [20]. For each composition x the RUS spectra of up to 100 resonance frequencies were measured in a range of 70-900 kHz at different temperatures between 350 and 100 K. The evaluation of the elasticity tensor from the RUS spectra is carried out by a least-squares procedure in which observed resonance frequencies are compared with calculated frequencies.…”

Section: Methodsmentioning

confidence: 99%

Elastic properties of para- and ferroelectric phases in the system Li2−xNaxGe4O9

Haussühl¹,

Haussühl²,

Volnyanskiı̆³

2005

Materials Science and Engineering: B

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“…In our apparatus for acoustic spectroscopy the sample is mounted between two piezoelectric transducers. The first transducer excites the sample and the second transducer detects its vibrations while the frequency is scanned [22,19]. Figure 2 shows a small part of the spectrum at two temperatures.…”

Section: Elastic Measurementsmentioning

confidence: 99%

“…The theoretical background of this method of acoustic spectroscopy was developed two decades ago [13,14], but its use in experiments dates back only to more recent work [15][16][17][18][19]. The method is believed to be an excellent probe of phase transitions [20] and has already been applied in this area [21,22]. We consider its advantages and disadvantages for the investigation of elastic anomalies in some detail.…”

Section: Introductionmentioning

confidence: 99%

Optical and elastic anomalies near the phase transition in

Weber

Lüghausen

Rheingans

et al. 1996

J. Phys.: Condens. Matter

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K 2 Ge 8 O 17 shows a structural phase transition near T c ≈ 269 K. The temperature dependence of the optical birefringence n, of the elastic stiffness constants c ij and of the effective electro-optical coefficients r (eff ) is determined. At T c the derivative ∂ n/∂T changes its sign. Elastic properties are studied by recording the acoustic resonances of a rectangular parallelepiped. We discuss those features of the method which are important in the investigation of phase transitions. No signature of elastic softening near T c is observed in K 2 Ge 8 O 17 . Below T c , c 44 and c 66 increase continuously. The elastic hardening is accompanied by the onset of a small electro-optical effect. Its existence demonstrates the loss of the centre of symmetry, its anisotropy is consistent with a triclinic symmetry, and its magnitude suggests a spontaneous polarization of about 6 × 10 −4 C m −2 in the low-temperature phase. Although K 2 Ge 8 O 17 is reminiscent of a weak ferroelectric material there are some observations which are uncommon to a paraelectric-ferroelectric phase transition.

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Softening of the elasticity tensor of Na2[Fe(CN)5NO] · 2H2O upon generation of metastable electronic states by irradiation with light

Cited by 8 publications

References 15 publications

Photostrictive materials

Photostrictive materials

Elastic properties of para- and ferroelectric phases in the system Li2−xNaxGe4O9

Optical and elastic anomalies near the phase transition in

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