Calorimetric transitions on the melting line of the vortex system as a function of oxygen deficiency in high-purity YBa2Cu3Ox

被引：93

作者：

Roulin, M ^{[1
]}

Junod, A ^{[1
]}

Erb, A ^{[1
]}

Walker, E ^{[1
]}

机构：

[1] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva 4, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.80.1722

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report adiabatic specific heal measurements for a high-purity YBa2Cu3Ox twinned single crystal. The order of the transition on the melting line of the vortex system B-m (T) is investigated for three oxygen concentrations. For x = 7.00, no critical end point is observed. For x = 6.94, first-order transitions give way to second-order transitions above a tricritical point at a field B-cr = 9.5 T, and the slope of B-m(T) changes. The latent heal, the slope of B-m(T), and B-cr increase with x. Data for less pure crystals are included for comparison purposes. [S0031-9007(97)05280-0].

引用

页码：1722 / 1725

页数：4

共 25 条

[1]

AEGERTER CM, COMMUNICATION

[2]

BILLON B, COMMUNICATION

[3]

BOUQUET F, COMMUNICATION

[4] Reversible suppression of the so-called fishtail effect in ultra pure single crystals of YBa2Cu3O7-delta [J].

Erb, A ;

Genoud, JY ;

Marti, F ;

Daumling, M ;

Walker, E ;

Flukiger, R .

JOURNAL OF LOW TEMPERATURE PHYSICS, 1996, 105 (3-4) :1023-1028

[5] BAZRO3 - THE SOLUTION FOR THE CRUCIBLE CORROSION PROBLEM DURING THE SINGLE-CRYSTAL GROWTH OF HIGH-T-C SUPERCONDUCTORS REBA(2)CU(3)O(7-DELTA) RE=Y, PR [J].

ERB, A ;

WALKER, E ;

FLUKIGER, R .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1995, 245 (3-4) :245-251

[6] VORTEX LIQUID-STATE IN AN ELECTRON-IRRADIATED UNTWINNED YBA2CU3O7-DELTA CRYSTAL [J].

FENDRICH, JA ;

KWOK, WK ;

GIAPINTZAKIS, J ;

VANDERBEEK, CJ ;

VINOKUR, VM ;

FLESHLER, S ;

WELP, U ;

VISWANATHAN, HK ;

CRABTREE, GW .

PHYSICAL REVIEW LETTERS, 1995, 74 (07) :1210-1213

[7] THERMAL FLUCTUATIONS, QUENCHED DISORDER, PHASE-TRANSITIONS, AND TRANSPORT IN TYPE-II SUPERCONDUCTORS [J].

FISHER, DS ;

FISHER, MPA ;

HUSE, DA .

PHYSICAL REVIEW B, 1991, 43 (01) :130-159

[8] Specific heat peaks observed up to 16 T on the melting line of the vortex lattice in YBa2Cu3O7 [J].

Junod, A ;

Roulin, M ;

Genoud, JY ;

Revaz, B ;

Erb, A ;

Walker, E .

PHYSICA C, 1997, 275 (3-4) :245-258

[9] Vortex-lattice phase transitions in Bi2Sr2CaCu2O8 crystals with different oxygen stoichiometry [J].

Khaykovich, B ;

Zeldov, E ;

Majer, D ;

Li, TW ;

Kes, PH ;

Konczykowski, M .

PHYSICAL REVIEW LETTERS, 1996, 76 (14) :2555-2558

[10] THE EFFECT OF CORRELATED AND POINT-DEFECTS ON THE VORTEX LATTICE MELTING TRANSITION IN SINGLE-CRYSTAL YBA2CU3O7-DELTA [J].

KWOK, WK ;

FENDRICH, J ;

FLESHLER, S ;

WELP, U ;

DOWNEY, J ;

CRABTREE, GW ;

GIAPINTZAKIS, J .

PHYSICA B, 1994, 197 (1-4) :579-587

← 1 2 3 →