SPECTRAL SHAPE OF THE ALPHA-PROCESS IN SUPERCOOLED LIQUIDS REVISITED

被引:47
作者
KUDLIK, A
BENKHOF, S
LENK, R
ROSSLER, E
机构
[1] Physikalisches Institut, Universität Bayreuth, Bayreuth
来源
EUROPHYSICS LETTERS | 1995年 / 32卷 / 06期
关键词
D O I
10.1209/0295-5075/32/6/009
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The scaling form presented by Nagel and coworkers for the alpha-process in supercooled liquids is re-examinated in the light of new dielectric relaxation data. Several data sets are compared in order to check quantitative relationships implied by the scaling and to examine the reliability of dielectric measurements. The analysis shows that no master curve can be obtained by the procedure suggested. Furthermore, we find that the scaling may obscure peculiarities in the dielectric response, e.g., for the glass formers salol and tricresyl phosphate additional relaxation processes are suppressed. We conclude that the spectral shape of the a-process remains an open question.
引用
收藏
页码:511 / 516
页数:6
相关论文
共 10 条
[1]  
BOTTCHER CJF, 1978, THEORY ELECTRIC POLA, V2
[2]   SPECIFIC-HEAT SPECTROSCOPY AND DIELECTRIC SUSCEPTIBILITY MEASUREMENTS OF SALOL AT THE GLASS-TRANSITION [J].
DIXON, PK .
PHYSICAL REVIEW B, 1990, 42 (13) :8179-8186
[3]   RELAXATION PROCESSES IN SUPERCOOLED LIQUIDS [J].
GOTZE, W ;
SJOGREN, L .
REPORTS ON PROGRESS IN PHYSICS, 1992, 55 (03) :241-376
[4]  
HOFMANN A, 1994, DISORDER EFFECTS ON RELAXATIONAL PROCESSES, P309
[5]   VISCOUS LIQUIDS AND GLASS TRANSITION .2. SECONDARY RELAXATIONS IN GLASSES OF RIGID MOLECULES [J].
JOHARI, GP ;
GOLDSTEIN, M .
JOURNAL OF CHEMICAL PHYSICS, 1970, 53 (06) :2372-+
[6]  
KUDLIK A, UNPUB
[7]   WIDE-FREQUENCY DIELECTRIC SUSCEPTIBILITY MEASUREMENTS IN GLYCEROL [J].
MENON, N ;
OBRIEN, KP ;
DIXON, PK ;
WU, L ;
NAGEL, SR ;
WILLIAMS, BD ;
CARINI, JP .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1992, 141 (1-3) :61-65
[8]   INDICATIONS FOR A CHANGE OF TRANSPORT MECHANISM IN SUPERCOOLED LIQUIDS AND THE DYNAMICS CLOSE AND BELOW T-G [J].
ROSSLER, E ;
WARSCHEWSKE, U ;
EIERMANN, P ;
SOKOLOV, AP ;
QUITMANN, D .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1994, 172 :113-125
[9]   ANOMALIES IN THE SCALING OF THE DIELECTRIC ALPHA-RELAXATION [J].
SCHONHALS, A ;
KREMER, F ;
HOFMANN, A ;
FISCHER, EW ;
SCHLOSSER, E .
PHYSICAL REVIEW LETTERS, 1993, 70 (22) :3459-3462
[10]   RELAXATION MECHANISMS IN A BENZYL-CHLORIDE TOLUENE GLASS [J].
WU, L .
PHYSICAL REVIEW B, 1991, 43 (12) :9906-9915