Pressure dependence of the refractive index and dielectric constant in a fluoroperovskite, KMgF3

Kenji Uchino, Shoichiro Nomura, K. Vedam, Robert E. Newnham, Leslie E. Cross

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The hydrostatic-pressure dependence of the refractive index and the low-frequency dielectric constant of a perovskite-type single crystal, KMgF3, have been determined at room temperature. The refractive index n for =589.3 nm increases monotonously in proportion to pressure p with a slope of np=2.46×10-4kbar-1. On the other hand, the dielectric constant at 10 kHz decreases with increasing pressure, from which the electric-displacement-related electrostrictive coefficient Qh (=Q11+2Q12) is calculated as 0.24 m4 C-2. These data are compared with the np values and the Qh coefficients of various alkali fluorides and perovskite oxides.

Original languageEnglish (US)
Pages (from-to)6921-6925
Number of pages5
JournalPhysical Review B
Volume29
Issue number12
DOIs
StatePublished - Jan 1 1984

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pressure dependence
permittivity
refractivity
coefficients
hydrostatic pressure
fluorides
alkalies
proportion
slopes
low frequencies
oxides
single crystals
room temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Uchino, Kenji ; Nomura, Shoichiro ; Vedam, K. ; Newnham, Robert E. ; Cross, Leslie E. / Pressure dependence of the refractive index and dielectric constant in a fluoroperovskite, KMgF3. In: Physical Review B. 1984 ; Vol. 29, No. 12. pp. 6921-6925.
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Pressure dependence of the refractive index and dielectric constant in a fluoroperovskite, KMgF3. / Uchino, Kenji; Nomura, Shoichiro; Vedam, K.; Newnham, Robert E.; Cross, Leslie E.

In: Physical Review B, Vol. 29, No. 12, 01.01.1984, p. 6921-6925.

Research output: Contribution to journalArticle

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T1 - Pressure dependence of the refractive index and dielectric constant in a fluoroperovskite, KMgF3

AU - Uchino, Kenji

AU - Nomura, Shoichiro

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AU - Cross, Leslie E.

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AB - The hydrostatic-pressure dependence of the refractive index and the low-frequency dielectric constant of a perovskite-type single crystal, KMgF3, have been determined at room temperature. The refractive index n for =589.3 nm increases monotonously in proportion to pressure p with a slope of np=2.46×10-4kbar-1. On the other hand, the dielectric constant at 10 kHz decreases with increasing pressure, from which the electric-displacement-related electrostrictive coefficient Qh (=Q11+2Q12) is calculated as 0.24 m4 C-2. These data are compared with the np values and the Qh coefficients of various alkali fluorides and perovskite oxides.

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