DYNAMIC MEASUREMENTS OF LOW-TEMPERATURE SPECIFIC-HEAT OF 2H-TAS2 SINGLE-CRYSTALS IN MAGNETIC-FIELDS

被引:30
作者
GAROCHE, P [1 ]
MANUEL, P [1 ]
VEYSSIE, JJ [1 ]
MOLINIE, P [1 ]
机构
[1] LAB CHIM MINERALE,NANTES,FRANCE
关键词
D O I
10.1007/BF00114956
中图分类号
O59 [应用物理学];
学科分类号
摘要
Specific heat measurements on 2 H-TaS2 single crystals have been carried out between 0.3 and 3 K using the ac calorimetry technique. An upturn in the normal-state data, obtained below 1 K in a 50-kG applied magnetic field, was observed to depend on the measuring frequency. It may be ascribed to a nuclear contribution with a relaxation rate directly proportional to absolute temperature. The basic parameters of the superconducting state have been determined, showing that the material is a very anisotropic, three-dimensional, type II superconductor. The broad transition observed in the heat capacity measurements cannot be analyzed in terms of fluctuations, but rather results from inhomogeneity effects. © 1978 Plenum Publishing Corporation.
引用
收藏
页码:323 / 336
页数:14
相关论文
共 18 条
[1]   TRANSITION-TEMPERATURE OF STRONG-COUPLED SUPERCONDUCTORS REANALYZED [J].
ALLEN, PB ;
DYNES, RC .
PHYSICAL REVIEW B, 1975, 12 (03) :905-922
[2]   LAYERED SUPERCONDUCTORS IN HIGH MAGNETIC-FIELDS [J].
AOI, K ;
DIETERICH, W ;
FULDE, P .
ZEITSCHRIFT FUR PHYSIK, 1974, 267 (03) :223-228
[3]   EVIDENCE FOR A CONNECTION BETWEEN CHARGE-DENSITY WAVES AND PRESSURE ENHANCEMENT OF SUPERCONDUCTIVITY IN 2H-NBSE-2 [J].
BERTHIER, C ;
MOLINIE, P ;
JEROME, D .
SOLID STATE COMMUNICATIONS, 1976, 18 (9-10) :1393-1395
[4]  
BULAEVSKII LN, 1975, SOV PHYS JETP, V21, P66
[5]  
DISALVO FJ, 1971, PHYS REV LETT, V27, P310, DOI 10.1103/PhysRevLett.27.310
[6]  
Efetov K., 1975, SOV PHYS JETP, V41, P76
[7]   EXPERIMENTAL INVESTIGATION OF SUPERCONDUCTIVITY IN 2H-NBSE-2 SINGLE-CRYSTAL [J].
GAROCHE, P ;
VEYSSIE, JJ ;
MANUEL, P ;
MOLINIE, P .
SOLID STATE COMMUNICATIONS, 1976, 19 (05) :455-460
[8]   THEORY OF UPPER CRITICAL-FIELD IN LAYERED SUPERCONDUCTORS [J].
KLEMM, RA ;
LUTHER, A ;
BEASLEY, MR .
PHYSICAL REVIEW B, 1975, 12 (03) :877-891
[9]  
LAWRENCE WE, 1971, 12TH P INT C LOW TEM, P361
[10]   SPECIFIC-HEAT JUMP OF SUPERCONDUCTING LAMELLAS WITH PAIR-BREAKING BOUNDARY-CONDITIONS [J].
MANUEL, P ;
VEYSSIE, JJ .
PHYSICAL REVIEW B, 1976, 14 (01) :78-88