Second-Order Ferroic State Shifts

Aizu, Kêitsirô

doi:10.1143/jpsj.34.121

Cited by 100 publications

(32 citation statements)

References 4 publications

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“…In the basic classification [3,4], ferroics are classified as ferroelectrics (occurrence of P S ), ferroelastics or ferrobielectrics (spontaneous strain e S or new permittivity components k), ferroelastoelectrics (new components of piezoelectric tensor d), and ferrobielastics (new components of elastic compliance s). Two domain states ͓͑1͒, ͑2͔͒ differ in the Gibbs free energy G when electric field E and elastic stress s are applied.…”

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confidence: 99%

Higher Order Ferroic Switching Induced by Scanning Force Microscopy

2001

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We present the observation of ferroelastoelectric switching in a ferroelectric material. It is achieved in barium titanate thin film by simultaneously applying electric field and compressive stress with the tip of a scanning force microscope. For low compressive stresses, the presented measurements reveal classical ferroelectric domain reversal, i.e., the spontaneous polarization is aligned parallel to the applied electric field. However, for high compressive stresses the direction of polarization after switching is antiparallel to the poling field, demonstrating ferroelastoelectric switching.

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confidence: 99%

Higher Order Ferroic Switching Induced by Scanning Force Microscopy

2001

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“…In fact il = (n + -n _ ) /(n + + n _ ) where n + and n -are the number of tetraedra NH [14]. Furthermore a susceptibility such as anô(x.y EZ) is expected to reflect the fluctuations n2' > of the order parameter and to increase near the transition.…”

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Electro-optic measurement of the order parameter of NH4Cl

1978

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Résumé. 2014 Abstract. 2014 We present here measurements of the temperature variation of the electro-optic effect in the low temperature phase of NH4Cl and we show how they are related to the order parameter of the order-disorder transition. These measurements are made difficult by the presence of parasitic strain birefringence, and by the existence of domains which produce a change of sign of the electro-optic effect. The results are compared with previous measurements of the order parameter by the piezoelectric effect and second harmonic generation, and their interpretation, following the Landau theory or power law with critical exponents, is discussed in relation to the existence of a multicritical point under high pressure.An exponential tail of the order parameter, extending over several degrees in the high temperature phase is systematically found in all these experiments. The origin of this residual order is probably related to the stresses produces by crystalline defects.

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“…0108-7673/90/080711-03503.00 be distinguished by the values of components of certain macroscopic tensorial physical properties of the domains (Aizu, 1973;Newnham & Cross, 1974;Wadhawan, 1982). Aizu (1970;see also Cracknell, 1972) has given a tensorial classification of ferroic crystals based on a rank 1 physical-property tensor's ability to distinguish some or all of the domains.…”

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confidence: 99%

Physical-property tensors and tensor pairs in crystals

Litvin¹,

Литвин²

1990

Acta Cryst Sect A

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The form of physical-property tensors of rank 0, 1 and 2 invariant under the 32 crystallographic point groups and their subgroups are tabulated. This constitutes the basis for the tensorial classification of domain pairs in ferroic crystals which is given via a group theoretical classification of the corresponding physical-property tensor pairs. We tabulate this classification of tensor pairs for all physical-property tensors of rank 0, 1 and 2, and domain point-group symmetry.

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Second-Order Ferroic State Shifts

Cited by 100 publications

References 4 publications

Higher Order Ferroic Switching Induced by Scanning Force Microscopy

Higher Order Ferroic Switching Induced by Scanning Force Microscopy

Electro-optic measurement of the order parameter of NH4Cl

Physical-property tensors and tensor pairs in crystals

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