淡江大學機構典藏:Item 987654321/24902
English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 62830/95882 (66%)
造訪人次 : 4041818      線上人數 : 968
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧：
  • 您可在西文檢索詞彙前後加上"雙引號"，以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋，建議至進階搜尋限定作者欄位，可獲得較完整資料
    •  進階搜尋


    請使用永久網址來引用或連結此文件: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/24902


    題名: Critical behavior at the nematic-smectic-A transition in butyloxybenzylidene heptylaniline (4O.7)
    作者: Garland, C. W.;Meichle, M.;Ocko, B.M.;Kortan, A. R.;Safinya, C. R.;Yu, L.J.;Litster, J. D.;Birgeneau,R.J.
    貢獻者: 淡江大學化學學系
    日期: 1983-06
    上傳時間: 2013-07-09 15:25:23 (UTC+8)
    出版者: College Park: American Physical Society
    摘要: High-resolution ac calorimetric, x-ray, and light-scattering measurements have been made on N-[4-(n-butyloxy)benzylidene]-4'-(n-heptyl)aniline (4O.7) near the nematic-smectic-A phase transition. This transition is second order, with a variation in Cp which is well described by a critical exponent α=α'=-0.026 corresponding to the three-dimensional XY model. The longitudinal and transverse correlation lengths exhibit single-power-law divergences over the reduced-temperature range 10-2 to 3×10-5 with exponents ν∥=0.78+/-0.02 and ν⊥=0.65+/-0.02, respectively. The anisotropic hyperscaling relation ν∥+2ν⊥+α=2 is satisfied to within the errors. A dynamical-scaling analysis of light-scattering measurements of the bend-mode director fluctuations with elastic constant K3 yields values for ξ∥ which agree absolutely with the x-ray measurements. Thus the data are all internally consistent, and they appear to exclude all current theories of the nematic-smectic-A transition. It is observed that the overall critical behavior in smectic liquid crystals is sensitive to the width of the nematic range; this may offer an explanation for the apparent nonuniversality of the exponents.
    關聯: Physical Review A (General Physics) 27(6), pp.3234
    DOI: 10.1103/PhysRevA.27.3234
    顯示於類別:[化學學系暨研究所] 期刊論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    Critical behavior at the nematic-smectic-A transition in butyloxybenzylidene heptylaniline (4O.7).pdf424KbAdobe PDF2檢視/開啟
    index.html0KbHTML307檢視/開啟
    index.html0KbHTML71檢視/開啟

    在機構典藏中所有的資料項目都受到原著作權保護.

    TAIR相關文章

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋