Temperature and frequency dependence of width in sodium potassium niobate mixed system

Manish Uniyal; S. C. Bhatt; R. Bhandari; M. S. Ramchandra Rao; R. P. Pant; B. S. Semwal

Temperature and frequency dependence of width in sodium potassium niobate mixed system

Manish Uniyal, S. C. Bhatt, R. Bhandari, M. S. Ramchandra Rao, R. P. Pant, B. S. Semwal

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Considering a quadratic anharmonic model Hamiltonian and using double time temperature dependent Green's function method and Dyson's equation treatment, expressions for the width in the frequency response for mixed perovskite type ferrocelectrics have been obtained. Using the experimentally observed dielectric constant and loss tangent for Na ₁ K NbO ₃, [where x = 0, 0.4, 0.5], the temperature dependence of soft mode width in these samples at 10 and 100 kH/ has been calculated. Anomaly has been observed in the behaviour of soft mode width, near the transition temperatures in these compounds.

Original language	English
Pages (from-to)	341-346
Number of pages	6
Journal	Indian Journal of Pure and Applied Physics
Volume	42
Issue number	5
Publication status	Published - May 2004
Externally published	Yes

Keywords

Ferroelectricity
Piezoelectricity
Soft mode frequency

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Cite this

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title = "Temperature and frequency dependence of width in sodium potassium niobate mixed system",

abstract = "Considering a quadratic anharmonic model Hamiltonian and using double time temperature dependent Green's function method and Dyson's equation treatment, expressions for the width in the frequency response for mixed perovskite type ferrocelectrics have been obtained. Using the experimentally observed dielectric constant and loss tangent for Na 1 K NbO 3, [where x = 0, 0.4, 0.5], the temperature dependence of soft mode width in these samples at 10 and 100 kH/ has been calculated. Anomaly has been observed in the behaviour of soft mode width, near the transition temperatures in these compounds.",

keywords = "Ferroelectricity, Piezoelectricity, Soft mode frequency",

author = "Manish Uniyal and Bhatt, {S. C.} and R. Bhandari and {Ramchandra Rao}, {M. S.} and Pant, {R. P.} and Semwal, {B. S.}",

year = "2004",

month = may,

language = "English",

volume = "42",

pages = "341--346",

journal = "Indian Journal of Pure and Applied Physics",

issn = "0019-5596",

publisher = "National Institute of Science Communication and Information Resources (NISCAIR)",

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TY - JOUR

T1 - Temperature and frequency dependence of width in sodium potassium niobate mixed system

AU - Uniyal, Manish

AU - Bhatt, S. C.

AU - Bhandari, R.

AU - Ramchandra Rao, M. S.

AU - Pant, R. P.

AU - Semwal, B. S.

PY - 2004/5

Y1 - 2004/5

N2 - Considering a quadratic anharmonic model Hamiltonian and using double time temperature dependent Green's function method and Dyson's equation treatment, expressions for the width in the frequency response for mixed perovskite type ferrocelectrics have been obtained. Using the experimentally observed dielectric constant and loss tangent for Na 1 K NbO 3, [where x = 0, 0.4, 0.5], the temperature dependence of soft mode width in these samples at 10 and 100 kH/ has been calculated. Anomaly has been observed in the behaviour of soft mode width, near the transition temperatures in these compounds.

AB - Considering a quadratic anharmonic model Hamiltonian and using double time temperature dependent Green's function method and Dyson's equation treatment, expressions for the width in the frequency response for mixed perovskite type ferrocelectrics have been obtained. Using the experimentally observed dielectric constant and loss tangent for Na 1 K NbO 3, [where x = 0, 0.4, 0.5], the temperature dependence of soft mode width in these samples at 10 and 100 kH/ has been calculated. Anomaly has been observed in the behaviour of soft mode width, near the transition temperatures in these compounds.

KW - Ferroelectricity

KW - Piezoelectricity

KW - Soft mode frequency

UR - http://www.scopus.com/inward/record.url?scp=10444224572&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:10444224572

SN - 0019-5596

VL - 42

SP - 341

EP - 346

JO - Indian Journal of Pure and Applied Physics

JF - Indian Journal of Pure and Applied Physics

IS - 5

ER -

Temperature and frequency dependence of width in sodium potassium niobate mixed system

Abstract

Keywords

ASJC Scopus subject areas

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