A RAMAN-STUDY OF THE STRUCTURAL-PROPERTIES OF YBA2(CU1-XFEX)3OY

被引：10

作者：

LIAROKAPIS, E

WILLE, LT

LEVENTOURI, T

MARTINEZ, L

LU, H

HADJIEV, V

ILIEV, M

机构：

[1] FLORIDA ATLANTIC UNIV, DEPT PHYS, BOCA RATON, FL 33431 USA

[2] UNIV SOFIA, DEPT PHYS, BU-1126 SOFIA, BULGARIA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1990年 / 170卷 / 5-6期

关键词：

D O I：

10.1016/0921-4534(90)90010-C

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effects of Fe-substitution of YBa2Cu3Oy have been investigated by means of Raman scattering, X-ray diffraction, resistivity and susceptibility measurements. A series of samples of YBa2(Cu1 - xFex)3Oy with different dopant concentration (0 ≤ x ≤ 0.15) has been prepared in two batches, the second set having undergone twice the heat and mechanical treatment used to produce the first batch. Considerable improvement in the superconducting transition temperature, Tc, is obtained upon reprocessing. A phase transformation from orthorhombic to tetragonal symmetry is observed for x=0.05 from the X-ray measurements in agreement with previous work. Using a micro-Raman technique, all five Ag vibrational modes have been measured and their dependence on Fe-concentration is analyzed. There are indications that iron substitutes for copper at both sites and that the structure is a mixture of orthorhombic and tetragonal microdomains for all x. © 1990.

引用

页码：419 / 426

页数：8

共 40 条

[1]

ARAI J, 1989, J PHYS SOC JPN, V58, P673, DOI 10.1143/JPSJ.58.673

[2] EFFECT OF SUBSTITUTIONAL IMPURITIES (AL,CO,FE,GA) ON THE ORTHORHOMBIC PHASE OF YBA2CU3O7-DELTA [J].

BAUMGARTEL, G ;

BENNEMANN, KH .

PHYSICAL REVIEW B, 1989, 40 (10) :6711-6716

[3]

BEYERS R, 1989, SOLID STATE PHYS, V42, P135

[4] METALLIC DOPING SITES IN Y1BA2CU3O7-DELTA [J].

BOOLCHAND, P ;

BLUE, C ;

ELGAID, K ;

ZITKOVSKY, I ;

MCDANIEL, D ;

HUFF, W ;

GOODMAN, B ;

LEMON, G ;

FARRELL, DE ;

CHANDRASEKHAR, BS .

PHYSICAL REVIEW B, 1988, 38 (16) :11313-11316

[5] NEUTRON AND ELECTRON-DIFFRACTION STUDY OF YBA2CU22CU1.77FE.23O7.13 [J].

BORDET, P ;

HODEAU, JL ;

STROBEL, P ;

MAREZIO, M ;

SANTORO, A .

SOLID STATE COMMUNICATIONS, 1988, 66 (04) :435-439

[6] EVIDENCE FOR FE-4+ IN YBA2(CU1-XFE-57X)3O7-Y, YBA2(CU1-XCO-57X)3O7-Y BY ABSORPTION AND EMISSION MOSSBAUER-SPECTROSCOPY [J].

BOTTYAN, L ;

MOLNAR, B ;

NAGY, DL ;

SZUCS, IS ;

TOTH, J ;

DENGLER, J ;

RITTER, G ;

SCHOBER, J .

PHYSICAL REVIEW B, 1988, 38 (16) :11373-11381

[7] DISTORTED CHAIN SITES FOR CO-SUBSTITUTED AND FE-SUBSTITUTED YBA2CU3O7-DELTA [J].

BRIDGES, F ;

BOYCE, JB ;

CLAESON, T ;

GEBALLE, TH ;

TARASCON, JM .

PHYSICAL REVIEW B, 1989, 39 (16) :11603-11617

[8] SYNTHESIS AND CHARACTERIZATION OF YBA2(CU1-XCOX)3O7-DELTA, YBA2(CU1-XNIX)3O7-DELTA - CRYSTAL SYMMETRY, SUPERCONDUCTIVITY, AND THE ROLE OF OXYGEN [J].

BRINGLEY, JF ;

CHEN, TM ;

AVERILL, BA ;

WONG, KM ;

POON, SJ .

PHYSICAL REVIEW B, 1988, 38 (04) :2432-2438

[9]

BURMESTER CP, IN PRESS

[10] MONTE-CARLO STUDIES OF OXYGEN ORDERING IN THE YBA2CU3-XAXO7-DELTA SYSTEMS (A=GA,AL) [J].

CAI, ZX ;

MAHANTI, SD .

PHYSICAL REVIEW B, 1989, 40 (10) :6558-6563

← 1 2 3 4 →