Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>O
We elaborate a modification of the deformable two-sublattice Mitsui model of [Levitskii R.R. et al., Phys. Rev. B. 2003, Vol. 67, 174112] and [Levitskii R.R. et al., Condens. Matter Phys., 2005, Vol. 8, 881] that consistently takes into account diagonal components of the strain tensor, arising eithe...
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| Format: | Article |
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Institute for Condensed Matter Physics
2011-12-01
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| Series: | Condensed Matter Physics |
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| Online Access: | http://dx.doi.org/10.5488/CMP.14.43602 |
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| author | I.R. Zachek R.R. Levitskii A.P. Moina |
| author_facet | I.R. Zachek R.R. Levitskii A.P. Moina |
| author_sort | I.R. Zachek |
| collection | DOAJ |
| description | We elaborate a modification of the deformable two-sublattice Mitsui model of [Levitskii R.R. et al., Phys. Rev. B. 2003, Vol. 67, 174112] and [Levitskii R.R. et al., Condens. Matter Phys., 2005, Vol. 8, 881] that consistently takes into account diagonal components of the strain tensor, arising either due to external pressures or due to thermal expansion. We calculate the related to those strains thermal, piezoelectric, and elastic characteristics of the system. Using the developed fitting procedure, a set of the model parameters is found for the case of Rochelle salt crystals, providing a satisfactory agreement with the available experimental data for the hydrostatic and uniaxial pressure dependences of the Curie temperatures, temperature dependences of spontaneous diagonal strains, linear thermal expansion coefficients, elastic constants c<sub>ij</sub><sup>E</sup> and c<sub>i4</sub><sup>E</sup>, piezoelectric coefficients d<sub>1i</sub> and g<sub>1i</sub> (i=1,2,3). The hydrostatic pressure variation of dielectric permittivity is described using a derived expression for the permittivity of a partially clamped crystal. The dipole moments and the asymmetry parameter of Rochelle salt are found to increase with hydrostatic pressure. |
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| id | doaj.art-a98f26ef31cd4f7ea96123e664f66dd4 |
| institution | Directory Open Access Journal |
| issn | 1607-324X |
| language | English |
| last_indexed | 2024-12-14T03:51:16Z |
| publishDate | 2011-12-01 |
| publisher | Institute for Condensed Matter Physics |
| record_format | Article |
| series | Condensed Matter Physics |
| spelling | doaj.art-a98f26ef31cd4f7ea96123e664f66dd42022-12-21T23:18:13ZengInstitute for Condensed Matter PhysicsCondensed Matter Physics1607-324X2011-12-0114443602Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>OI.R. ZachekR.R. LevitskiiA.P. MoinaWe elaborate a modification of the deformable two-sublattice Mitsui model of [Levitskii R.R. et al., Phys. Rev. B. 2003, Vol. 67, 174112] and [Levitskii R.R. et al., Condens. Matter Phys., 2005, Vol. 8, 881] that consistently takes into account diagonal components of the strain tensor, arising either due to external pressures or due to thermal expansion. We calculate the related to those strains thermal, piezoelectric, and elastic characteristics of the system. Using the developed fitting procedure, a set of the model parameters is found for the case of Rochelle salt crystals, providing a satisfactory agreement with the available experimental data for the hydrostatic and uniaxial pressure dependences of the Curie temperatures, temperature dependences of spontaneous diagonal strains, linear thermal expansion coefficients, elastic constants c<sub>ij</sub><sup>E</sup> and c<sub>i4</sub><sup>E</sup>, piezoelectric coefficients d<sub>1i</sub> and g<sub>1i</sub> (i=1,2,3). The hydrostatic pressure variation of dielectric permittivity is described using a derived expression for the permittivity of a partially clamped crystal. The dipole moments and the asymmetry parameter of Rochelle salt are found to increase with hydrostatic pressure.http://dx.doi.org/10.5488/CMP.14.43602Rochelle saltthermal expansionhydrostatic pressureuniaxial pressureMitsui model |
| spellingShingle | I.R. Zachek R.R. Levitskii A.P. Moina Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>O Condensed Matter Physics Rochelle salt thermal expansion hydrostatic pressure uniaxial pressure Mitsui model |
| title | Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>O |
| title_full | Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>O |
| title_fullStr | Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>O |
| title_full_unstemmed | Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>O |
| title_short | Mitsui model with diagonal strains: A unified description of external pressure effect and thermal expansion of Rochelle salt NaKC<sub>4</sub>H<sub>4</sub>O<sub>6</sub>·4H<sub>2</sub>O |
| title_sort | mitsui model with diagonal strains a unified description of external pressure effect and thermal expansion of rochelle salt nakc sub 4 sub h sub 4 sub o sub 6 sub ·4h sub 2 sub o |
| topic | Rochelle salt thermal expansion hydrostatic pressure uniaxial pressure Mitsui model |
| url | http://dx.doi.org/10.5488/CMP.14.43602 |
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