HIGH-RESOLUTION CALORIMETRIC STUDY OF THE NEMATIC-SMECTIC-A TRANSITION IN OCTYLOXYCYANOBIPHENYL (8OCB)

被引：82

作者：

GARLAND, CW ^{[1
]}

KASTING, GB ^{[1
]}

LUSHINGTON, KJ ^{[1
]}

机构：

[1] MIT,CTR MAT SCI & ENGN,CAMBRIDGE,MA 02139

来源：

PHYSICAL REVIEW LETTERS | 1979年 / 43卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.43.1420

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An ac technique has been used to measure the heat capacity of 8OCB at 1 atm along several high-pressure isobars. The Cp data near the essentially second-order nematic-smectic-A (N-SmA) transition are inconsistent with the logarithmic singularity expected from the d=3, n=2 model of de Gennes but agree with a power-law divergence with = in the range 0.2-0.3. This behavior and an unexpected exponential decrease in the magnitude of the critical N-SmA heat capacity with increasing pressure are also confirmed in octylcyanobiphenyl (8CB). © 1979 The American Physical Society.

引用

页码：1420 / 1423

页数：4

共 19 条

[1] EXPERIMENTAL-OBSERVATION OF ANOMALOUS ORDERING IN A LANDAU-PEIERLS SYSTEM [J].