High-Resolution X-Ray Study of a Smectic-A-Smectic-C Phase Transition

C. R. Safinya; M. Kaplan; Jens Aage Als-Nielsen; R. J. Birgeneau; D. Davidov; J. D. Litster; D. L. Johnson; M. E. Neubert

doi:10.1103/PhysRevB.21.4149

High-Resolution X-Ray Study of a Smectic-A-Smectic-C Phase Transition

C. R. Safinya, M. Kaplan, Jens Aage Als-Nielsen, R. J. Birgeneau, D. Davidov, J. D. Litster, D. L. Johnson, M. E. Neubert

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We report measurements of the tilt angle Φ and the planar spacing dC near the second-order SmC-SmA transition in 4-n-pentyl-phenylthiol-4′-n-octyloxybenzoate (8S̅ 5). We find that the ratio Φ/invcos(dC/dA) is constant (1.2 ± 0.1) through the C phase, supporting a simple molecular-tilt model for the transition. For 5×10-3>1-T/Tc>3×10-5, Φ exhibits mean-field behavior. A simple Ginzburg-criterion argument indicates that the true critical region should be unobservably small for most A-C transitions.

Original language	English
Journal	Physical Review B
Volume	21
Issue number	9
Pages (from-to)	4149-4153
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.21.4149
Publication status	Published - 1980

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title = "High-Resolution X-Ray Study of a Smectic-A-Smectic-C Phase Transition",

abstract = "We report measurements of the tilt angle Φ and the planar spacing dC near the second-order SmC-SmA transition in 4-n-pentyl-phenylthiol-4′-n-octyloxybenzoate (8S̅ 5). We find that the ratio Φ/invcos(dC/dA) is constant (1.2 ± 0.1) through the C phase, supporting a simple molecular-tilt model for the transition. For 5×10-3>1-T/Tc>3×10-5, Φ exhibits mean-field behavior. A simple Ginzburg-criterion argument indicates that the true critical region should be unobservably small for most A-C transitions.",

author = "Safinya, \{C. R.\} and M. Kaplan and Als-Nielsen, \{Jens Aage\} and Birgeneau, \{R. J.\} and D. Davidov and Litster, \{J. D.\} and Johnson, \{D. L.\} and Neubert, \{M. E.\}",

year = "1980",

doi = "10.1103/PhysRevB.21.4149",

language = "English",

volume = "21",

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journal = "Physical Review B",

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TY - JOUR

T1 - High-Resolution X-Ray Study of a Smectic-A-Smectic-C Phase Transition

AU - Safinya, C. R.

AU - Kaplan, M.

AU - Als-Nielsen, Jens Aage

AU - Birgeneau, R. J.

AU - Davidov, D.

AU - Litster, J. D.

AU - Johnson, D. L.

AU - Neubert, M. E.

PY - 1980

Y1 - 1980

N2 - We report measurements of the tilt angle Φ and the planar spacing dC near the second-order SmC-SmA transition in 4-n-pentyl-phenylthiol-4′-n-octyloxybenzoate (8S̅ 5). We find that the ratio Φ/invcos(dC/dA) is constant (1.2 ± 0.1) through the C phase, supporting a simple molecular-tilt model for the transition. For 5×10-3>1-T/Tc>3×10-5, Φ exhibits mean-field behavior. A simple Ginzburg-criterion argument indicates that the true critical region should be unobservably small for most A-C transitions.

AB - We report measurements of the tilt angle Φ and the planar spacing dC near the second-order SmC-SmA transition in 4-n-pentyl-phenylthiol-4′-n-octyloxybenzoate (8S̅ 5). We find that the ratio Φ/invcos(dC/dA) is constant (1.2 ± 0.1) through the C phase, supporting a simple molecular-tilt model for the transition. For 5×10-3>1-T/Tc>3×10-5, Φ exhibits mean-field behavior. A simple Ginzburg-criterion argument indicates that the true critical region should be unobservably small for most A-C transitions.

U2 - 10.1103/PhysRevB.21.4149

DO - 10.1103/PhysRevB.21.4149

M3 - Journal article

SN - 2469-9950

VL - 21

SP - 4149

EP - 4153

JO - Physical Review B

JF - Physical Review B

IS - 9

ER -

High-Resolution X-Ray Study of a Smectic-A-Smectic-C Phase Transition

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