Effect of magnetic field on the phase transitions of EBBA by means of a high-resolution and super-sensitive DSC

被引：31

作者：

Hosaka, S ^{[1
]}

Tozaki, K ^{[1
]}

Hayashi, H ^{[1
]}

Inaba, H ^{[1
]}

机构：

[1] Chiba Univ, Fac Educ, Dept Sci Educ, Inage Ku, Chiba 2638522, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 337卷 / 1-4期

基金：

日本学术振兴会;

关键词：

heat flux; DSC; high resolution; phase transition; EBBA; magnetic effect;

D O I：

10.1016/S0921-4526(03)00389-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Phase transitions of the N-p-ethoxybenzylidene-p'-butylaniline (EBBA) were measured by means of a high-resolution and super-sensitive DSC. The crystal to liquid crystal transition and liquid crystal to isotropic liquid transition was observed at 305.8 and 352.4 K at a heating rate of I mK s(-1) respectively. The crystal to liquid crystal transition was found to have fine structures resulting from different crystalline states of the sample which depended on the sample preparation and on the heating rate of the measurement. The temperature due to liquid crystal to isotropic liquid transition was raised by 34 mK by applying a magnetic field of 5 T. The magnetic effect was discussed based on the extension of the Clapeyron equation. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：138 / 146

页数：9

共 19 条

[1] MAGNETIC-SUSCEPTIBILITY INVESTIGATIONS ON EBBA [J].

CHOUDARY, LV ;

RAO, JV ;

VENKATACHARYULU, P .

PHASE TRANSITIONS, 1987, 9 (03) :289-295

[2] METASTABLE PHASES IN KINETICS OF PHASE-TRANSFORMATIONS IN THE FROZEN LIQUID-CRYSTAL 4-ETHOXYBENZYLIDENE-4'-N-BUTYLANILINE [J].

ELOUATIB, A ;

GORS, C ;

FOURET, R .

LIQUID CRYSTALS, 1991, 9 (04) :539-550

[3] LOW-TEMPERATURE MESOMORPHISM IN TERMINALLY SUBSTITUTED BENZYLIDENEANILINES [J].

FLANNERY, JB ;

HAAS, W .

JOURNAL OF PHYSICAL CHEMISTRY, 1970, 74 (20) :3611-&

[4] Making water levitate [J].

Ikezoe, Y ;

Hirota, N ;

Nakagawa, J ;

Kitazawa, K .

NATURE, 1998, 393 (6687) :749-750

[5]

INABA H, 2002, PHYSICA B, V63, P324

[6] Melt structure of crystalline polymers as studied by means of magnetic orientation [J].

Kawai, T ;

Sakamoto, Y ;

Kimura, T .

MATERIALS TRANSACTIONS JIM, 2000, 41 (08) :955-961

[7] Magnetic-field induced orientation of paraffin [J].

Kimura, T ;

Yamato, M ;

Koshimizu, W ;

Kawai, T .

CHEMISTRY LETTERS, 1999, (10) :1057-1058

[8] Orientation-dependent magneto-Clapeyron equation [J].

Kimura, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2001, 40 (12) :6818-6820

[9] Magnetic Orientation of Crystalline Polymers in View of Liquid Crystallinity during Induction Period of Crystallization [J].

Kimura, Tsunehisa ;

Ezure, Hidetoshi ;

Sata, Hiroaki ;

Kimura, Fumiko ;

Tanaka, Shintaro ;

Ito, Eiko .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1998, 318 :141-155

[10] DIRECT MEASUREMENT OF MAGNETIC SUSCEPTIBILITY TENSOR ELEMENTS IN 1,3-CYCLOHEXADIENE AND COMPARISON WITH BENZENE AND OTHER SMALL-RING COMPOUNDS [J].

POCHAN, JM ;

FLYGARE, WH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1969, 91 (21) :5928-&

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