Effects of H2O absorption on electrical property and crystal structure in YBa2Cu3Ox

被引：7

作者：

Edo, S ^{[1
]}

Takama, T

机构：

[1] Hokkaido Polytech Coll, Dept Mech Syst Technol, Otaru, Hokkaido 04702, Japan

[2] Hokkaido Univ, Fac Engn, Dept Appl Phys, Kita Ku, Sapporo, Hokkaido 060, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1998年 / 37卷 / 07期

关键词：

superconductor; YBa2Cu3Ox; H2O absorption; diffusion; electrical property; crystal structure;

D O I：

10.1143/JJAP.37.3956

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polycrystals of YBa2Cu3Ox (x = 6.09, 6.24, 6.4. 6.52. 6.71 and 6.95) were annealed in air. The specimens with x greater than or equal to 6.4 were transformed from the superconducting to normal conducting phase at annealing temperatures between 100 and 200 degrees C. The powder X-ray diffraction profiles revealed that the original orthorhombic phase disappears and a new phase with a long lattice spacing grows at the above temperatures. Annealing tests carried out in several kinds of atmospheres clarified that the changes in resistivity and in crystal structure are induced by the absorption of H2O molecules in air by means of a diffusion process.

引用

页码：3956 / 3960

页数：5

共 14 条

[1] CHEMICAL DURABILITY OF HIGH-TEMPERATURE SUPERCONDUCTOR YBA2CU3O7-X IN AQUEOUS ENVIRONMENTS [J].

BANSAL, NP ;

SANDKUHL, AL .

APPLIED PHYSICS LETTERS, 1988, 52 (04) :323-325

[2] STABILITY OF SUPERCONDUCTING YBA2CU3O7 IN THE PRESENCE OF WATER [J].

BARNS, RL ;

LAUDISE, RA .

APPLIED PHYSICS LETTERS, 1987, 51 (17) :1373-1375

[3] SURFACE DEGRADATION OF YBA2CU3O7-DELTA SUPERCONDUCTORS ON EXPOSURE TO AIR AND HUMIDITY [J].

BUYUKLIMANLI, TH ;

SIMMONS, JH .

PHYSICAL REVIEW B, 1991, 44 (02) :727-733

[4] ORIGIN OF THE FORMATION OF THE TETRAGONAL PHASE NEAR-THE-SURFACE OF QUENCHED YBA2CU3OX [J].

EDO, S ;

TAKAMA, T .

PHYSICAL REVIEW B, 1994, 50 (05) :3302-3306

[5] EFFECT OF OXYGEN DESORPTION ON ELECTRICAL TRANSPORT IN YBA2CU3O7-DELTA [J].

FIORY, AT ;

GURVITCH, M ;

CAVA, RJ ;

ESPINOSA, GP .

PHYSICAL REVIEW B, 1987, 36 (13) :7262-7265

[6] HIGH-TEMPERATURE ORDER-DISORDER PHASE-TRANSITION IN THE SUPERCONDUCTOR Y1BA2CU3O6+DELTA OBSERVED BY ELECTRICAL-RESISTIVITY MEASUREMENTS [J].

FREITAS, PP ;

PLASKETT, TS .

PHYSICAL REVIEW B, 1987, 36 (10) :5723-5726

[7]

IZUMI F, 1993, RIETVELD METHOD, pCH13

[8]

KITAZAWA K, 1988, MATERIALS RES SOC S, V99, P33

[9] OXYGEN IN-DIFFUSION PROCESSES IN TETRAGONAL YBA2CU3O7-X OXIDE [J].

OTTAVIANI, G ;

NOBILI, C ;

NAVA, F ;

AFFRONTE, M ;

MANFREDINI, T ;

MATACOTTA, FC ;

GALLI, E .

PHYSICAL REVIEW B, 1989, 39 (13) :9069-9073

[10] THE DEGRADATION OF YBA2CU3O7 RESULTING FROM EXPOSURE TO WET AND DRY STEAM [J].

PHAM, DK ;

ZHAO, RP ;

FIELDING, PE ;

MYHRA, S ;

TURNER, PS .

JOURNAL OF MATERIALS RESEARCH, 1991, 6 (06) :1148-1155

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