Formation and mobility of oxygen vacancies in RuSr2GdCu2O8 -: art. no. 144519

被引：25

作者：

Cordero, F

Ferretti, M

Cimberle, MR

Masini, R

机构：

[1] Ist Acust OM Corbino, CNR, Area Ric Roma Tor Vergata, I-00133 Rome, Italy

[2] INFM, Unita Roma 1, Rome, Italy

[3] INFM, LAMIA, I-16146 Genoa, Italy

[4] Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy

[5] CNR, IMEM, Sez Genova, Dipartimento Fis, I-16146 Genoa, Italy

来源：

PHYSICAL REVIEW B | 2003年 / 67卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.67.144519

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxygen vacancies are introduced in the RuO2 and possibly CuO2 planes of RuSr2GdCu2O8 by annealing in vacuum above 600 K. The diffusive jumps of the O vacancies are accompanied by a reorientation of the local distortion, and are probed by measuring the elastic energy loss and modulus versus temperature at 1-10 kHz. An intense acoustic absorption peak develops near 670 K at 1 kHz and finally stabilizes after heating up to 920 K in vacuum. The analysis of the peak shows a barrier for the O diffusion of similar or equal to1.4 eV, and a slowing down of Curie-Weiss type, with T-C=400-470 K, due to the interaction among the O vacancies. A secondary peak is attributed to O vacancies trapped at defects in the RuO2 planes, or to vacancies in the CuO2 planes. No sign of structural phase transformation is found up to 920 K.

引用

收藏

页数：7

相关论文

共 36 条

[1] Synthesis and characterisation of superconducting RuSr2GdCu2O8 [J].

Artini, C ;

Carnasciali, MM ;

Costa, GA ;

Ferretti, M ;

Cimberle, MR ;

Putti, M ;

Masini, R .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 377 (04) :431-436

[2]

ARTINI C, 2002, RUTHENATE RUTHENOCUP

[3] Possible ordering of Ru and Cu in the charge-reservoir of magneto-superconductor RuSr2GdCu2O8 (Ru-1212):: Magnetic, transport, and TEM microstructural studies [J].

Awana, VPS ;

Ichihara, S ;

Nakamura, J ;

Karppinen, M ;

Yamauchi, H ;

Yang, J ;

Yelon, WB ;

James, WJ ;

Malik, SK .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :8501-8503

[4]

AWANA VPS, IN PRESS J LOW TEMP

[5] RUTHENIUM-BASED LAYERED CUPRATES RUSR(2)LNCU(2)O(8) AND RUSR2(LN(1+X) CE-1-X) CU2O10 (LN=SM, EU AND GD) [J].

BAUERNFEIND, L ;

WIDDER, W ;

BRAUN, HF .

PHYSICA C, 1995, 254 (1-2) :151-158

[6] ELASTIC AFTEREFFECT STUDY OF THE FERROELASTIC TETRAGONAL-ORTHORHOMBIC PHASE-TRANSITION IN YBA2CU3OX [J].

BRENSCHEIDT, F ;

SEIDEL, D ;

WIPF, H .

JOURNAL OF ALLOYS AND COMPOUNDS, 1994, 211 :264-269

[7] Large amplitudes and (critical) slowing-down of the order parameter fluctuations near the second-order tetragonal-to-orthorhombic phase transformation in YBa2Cu3Ox [J].

Brenscheidt, F ;

Foos, K ;

Wipf, H .

EUROPHYSICS LETTERS, 1997, 39 (03) :275-280

[8] FAST OXYGEN MOBILITY IN TETRAGONAL YBA2CU3O7-X BY ANELASTIC RELAXATION MEASUREMENTS [J].

CANNELLI, G ;

CANTELLI, R ;

CORDERO, F ;

FERRETTI, M ;

TREQUATTRINI, F .

SOLID STATE COMMUNICATIONS, 1991, 77 (06) :429-431

[9] DYNAMICS OF OXYGEN AND PHASE-TRANSITIONS IN THE 123 CERAMIC SUPERCONDUCTORS BY ANELASTIC RELAXATION MEASUREMENTS [J].

CANNELLI, G ;

CANTELLI, R ;

CORDERO, F ;

TREQUATTRINI, F .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1992, 5 (04) :247-257

[10] MOBILITY AND AGGREGATION OF OXYGEN IN YBA2CU3O6+X IN THE LOW-CONCENTRATION LIMIT [J].

CANNELLI, G ;

CANTELLI, R ;

CORDERO, F ;

PIRACCINI, N ;

TREQUATTRINI, F ;

FERRETTI, M .

PHYSICAL REVIEW B, 1994, 50 (22) :16679-16683

← 1 2 3 4 →