Time evolution of polar regions in (Sr0.65Ba0.35) 2NaNb5O15 single crystal

S. Miga; J. Dec; W. Cao

doi:10.1080/01411590600892419

Time evolution of polar regions in (Sr_0.65Ba_0.35) ₂NaNb₅O₁₅ single crystal

S. Miga, J. Dec, W. Cao

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Abstract

The linear, second-order and third-order dielectric susceptibilities χ₁, χ₂, χ₃ of a (Sr_0.65Ba_{0. 35})₂NaNb₅O₁₅ (SBNN) single crystal have been measured. Strong relaxation was found in all investigated dielectric susceptibilities near the phase transition. The time dependence of linear and third-order dielectric susceptibility can be explained as the effect of polar nano-clusters evolution. Near the phase transition, the net polarization of the crystal, monitored by second-order dielectric susceptibility, changes both its value and orientation. Measurements of the pyroelectric effect indicate that the non-zero net polarization in SBNN crystals appears spontaneously. In addition, the ferroelectric phase transition in SBNN showed many features of a first-order phase transition.

Original language	English (US)
Pages (from-to)	513-524
Number of pages	12
Journal	Phase Transitions
Volume	79
Issue number	6-7
DOIs	https://doi.org/10.1080/01411590600892419
State	Published - Jun 1 2006

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Instrumentation
General Materials Science

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title = "Time evolution of polar regions in (Sr0.65Ba0.35) 2NaNb5O15 single crystal",

abstract = "The linear, second-order and third-order dielectric susceptibilities χ1, χ2, χ3 of a (Sr0.65Ba0. 35)2NaNb5O 15 (SBNN) single crystal have been measured. Strong relaxation was found in all investigated dielectric susceptibilities near the phase transition. The time dependence of linear and third-order dielectric susceptibility can be explained as the effect of polar nano-clusters evolution. Near the phase transition, the net polarization of the crystal, monitored by second-order dielectric susceptibility, changes both its value and orientation. Measurements of the pyroelectric effect indicate that the non-zero net polarization in SBNN crystals appears spontaneously. In addition, the ferroelectric phase transition in SBNN showed many features of a first-order phase transition.",

author = "S. Miga and J. Dec and W. Cao",

note = "Funding Information: Financial support by KBN under grant 4 T08A 007 25 and partial support from the Harbin Institute of Technology to W. Cao are gratefully acknowledged.",

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doi = "10.1080/01411590600892419",

language = "English (US)",

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TY - JOUR

T1 - Time evolution of polar regions in (Sr0.65Ba0.35) 2NaNb5O15 single crystal

AU - Miga, S.

AU - Dec, J.

AU - Cao, W.

N1 - Funding Information: Financial support by KBN under grant 4 T08A 007 25 and partial support from the Harbin Institute of Technology to W. Cao are gratefully acknowledged.

PY - 2006/6/1

Y1 - 2006/6/1

N2 - The linear, second-order and third-order dielectric susceptibilities χ1, χ2, χ3 of a (Sr0.65Ba0. 35)2NaNb5O 15 (SBNN) single crystal have been measured. Strong relaxation was found in all investigated dielectric susceptibilities near the phase transition. The time dependence of linear and third-order dielectric susceptibility can be explained as the effect of polar nano-clusters evolution. Near the phase transition, the net polarization of the crystal, monitored by second-order dielectric susceptibility, changes both its value and orientation. Measurements of the pyroelectric effect indicate that the non-zero net polarization in SBNN crystals appears spontaneously. In addition, the ferroelectric phase transition in SBNN showed many features of a first-order phase transition.

AB - The linear, second-order and third-order dielectric susceptibilities χ1, χ2, χ3 of a (Sr0.65Ba0. 35)2NaNb5O 15 (SBNN) single crystal have been measured. Strong relaxation was found in all investigated dielectric susceptibilities near the phase transition. The time dependence of linear and third-order dielectric susceptibility can be explained as the effect of polar nano-clusters evolution. Near the phase transition, the net polarization of the crystal, monitored by second-order dielectric susceptibility, changes both its value and orientation. Measurements of the pyroelectric effect indicate that the non-zero net polarization in SBNN crystals appears spontaneously. In addition, the ferroelectric phase transition in SBNN showed many features of a first-order phase transition.

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JO - Phase Transitions

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IS - 6-7

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Time evolution of polar regions in (Sr_0.65Ba_0.35) ₂NaNb₅O₁₅ single crystal

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