One-dimensional behavior of ferroelastic domain arrays in neodymium pentaphosphate

Huang, Xinyan; Jiang, Sai; Xu, X. Y.; Zeng, W.; Ding, Feng; Wang, J. Y.

doi:10.1103/physrevb.52.9932

Cited by 8 publications

(18 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly the boundary related softening decreases and S 11 Ј assumes ultimately the bulk value. Huang et al 52 have studied the behavior of an array of ferroelastic domains using an Ising-type model with coarse-grained spin variables s = Ϯ 1 coupled to the strain so that the spontaneous strain of each ferroelastic domain is s⑀ s , i.e., Ϯ⑀ s in adjacent domains. They calculated the stress dependence of the average number n w of ferroelastic domain walls as…”

Section: B Domain-wall Contribution To the Low-frequency Elastic Commentioning

confidence: 99%

Dynamic elastic response ofKMn1−xCaxF3: Elastic softening and domain freezing

et al. 2009

View full text Add to dashboard Cite

Results of continuous-wave resonance ͑MHz-region͒ and ultralow-frequency ͑Hz-region͒ dynamic mechanical analyzer measurements of pure KMnF 3 and mixed crystals KMn 1−x Ca x F 3 ͑x Ͻ 0.017͒ are presented in a broad temperature range including the phase-transition regions. The elastic anomalies depend strongly on the measurement frequency: The MHz-elastic constants can be well fitted by Landau theory including the difference between isothermal and adiabatic behavior. Contrary, at low frequencies ͑0.1-50 Hz͒ an elastic softening ͑superelasticity͒ due to domain-wall motion is found quite similar to that observed recently in isostructural SrTiO 3 ͓A. V. Kityk et al., Phys. Rev. B 61, 946 ͑2000͔͒. However, unlike to SrTiO 3 , for the mixed system KMn 1−x Ca x F 3 we have measured freezing of the domain-wall movement around 100 K in a certain range of concentration of Ca 2+ ions ͑x = 0.003͒. Calculating the dynamic elastic response to the ac-stress field by taking into account the motion of randomly pinned ferroelastic domain walls in KMn 1−x Ca x F 3 yields excellent agreement between theory and experiment.

show abstract

Section: B Domain-wall Contribution To the Low-frequency Elastic Commentioning

confidence: 99%

Dynamic elastic response ofKMn1−xCaxF3: Elastic softening and domain freezing

et al. 2009

View full text Add to dashboard Cite

show abstract

“…In the present work we show, that this theory predicts the domain wall response to be very different for improper as compared to proper or pseudo proper ferroelastic phase transitions. We will demonstrate this on the examples of SrTiO 3 [15] and [17] and NH 4 HC 2 O 4 · 1 2 H 2 O (AHO, pseudo proper). AHO single crystals were grown in our lab following the procedure of Godet, et al [18].…”

mentioning

confidence: 88%

Giant domain wall response of highly twinned ferroelastic materials

Schranz

Kabelka

Sarras

et al. 2012

Applied Physics Letters

View full text Add to dashboard Cite

Many ferroelastic crystals display at sufficiently low measurement frequencies a huge elastic softening below Tc which is caused by domain wall motion. Materials range from perovskites to iron based superconductors and shape memory materials. We present a model -based on Landau-Ginzburg theory including long range elastic interaction between needle shaped ferroelastic domains -to describe the observed superelastic softening. The theory predicts that the domain wall contribution to the elastic susceptibility is different for improper and proper ferroelastic materials. A test of the theory against experimental data on SrTiO3, KMnF3, LaAlO3, La1−xNdxP5O14 and NH4HC2O4· 1 2 H2O yields excellent agreement.The macroscopic response of materials depends often on structures spanning a broad range of length and time scales. Examples of such inhomogeneous structures are precursor clusters near structural phase transitions, domains and domain walls, interfaces at first order displacive or reconstructive phase transitions, etc. They have been reported in a wide range of functional materials. Prominent cases are the enhancement of piezoelectric response [1] of nanotwinned BaTiO 3 for domain thickness below 50 nm, or the giant piezoelectric effect in ferroelectric relaxors [2] due to the high mobility of polar nanoregions [3]. Generally, domains and domain boundaries in ferroic crastals can act as structural elements for creating novel functional devices [4]. The usefulness of domain boundaries in Domain Boundary Engineering depends on the time scale of their response. Static or pinned domain boundaries can be used as functional units since they can host functional properties (ferroelectric, superconducting, etc.) which are absent in the bulk [5]. Mobile domain boundaries can lead to giant macroscopic responses, depending on the frequency of the changing external field.In the present work we will focus on ferroelastic materials, which depending on the type of coupling between the primary order parameter η and the strains ε can be classified as proper, pseudo proper, improper or coelastic ones [6]. Very often ferroelastic crystals consist of a large number of domains which are separated by domain boundaries [7]. Due to mechanical compatibility these domain boundaries should be planar with well defined orientation. However, in real crystals very often needle or dagger shaped domains appear [6]. There are still many open questions, e.g. concerning the stability of ferroelastic domains, their motion under an applied dynamic stress, the observed domain freezing [8] at sufficiently low temperature, etc.Understanding the macroscopic behaviour of multidomain crystals is important for technological applications as well as for the interpretation of seismic signals of our Earth, since domain wall motion influences the low frequency elastic and anelastic behaviour of minerals at seismic frequencies (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). In recent years we have performed quite detailled low frequency (0.1-...

show abstract

“…In the ferroelastic phase two equivalent orientational (ferroelastsic) domain states with opposite shear strain ±ε 5 appear. These ferroelastic domains form a regular stripe pattern and the number of domains increases drastically when approaching T c from below 36,37 .…”

Section: Proper or Pseudo-proper Ferroelastic Phase Transitionsmentioning

confidence: 99%

Superelastic Softening of Ferroelastic Multidomain Crystals

2012

View full text Add to dashboard Cite

Many proper and improper ferroelastic materials display (at sufficiently low measurement frequencies) a huge elastic softening below T c . This giant elastic softening, which can be suppressed with uniaxial stress, is caused by domain wall motion. Here we shortly review our results on frequency and temperature dependent elastic measurements of some perovskites which exhibit improper ferroelastic phase transitions. We also present a new model -based on Landau-Ginzburg theory including long range interaction of needle shaped ferroelastic domains -which describes superelastic softening observed in some of the perovskite systems very well. We also show, how the theory can be extended to describe proper ferroelastic materials and apply the theory to describe the elastic behaviour of the proper ferroelastic material La 1-x Nd x P 5 O 14 (LNPP).

show abstract

One-dimensional behavior of ferroelastic domain arrays in neodymium pentaphosphate

Cited by 8 publications

References 19 publications

Dynamic elastic response ofKMn1−xCaxF3: Elastic softening and domain freezing

Dynamic elastic response ofKMn1−xCaxF3: Elastic softening and domain freezing

Giant domain wall response of highly twinned ferroelastic materials

Superelastic Softening of Ferroelastic Multidomain Crystals

Contact Info

Product

Resources

About