Thermal properties of the magnetic RuSr2GdCu2O8 superconductor

被引：1

作者：

Costa, GA

Ubaldini, A

Artini, C

Carnasciali, MM

Masini, R

机构：

[1] Univ Genoa, INFM, LAMIA, I-16146 Genoa, Italy

[2] Univ Genoa, DCCI, I-16146 Genoa, Italy

[3] Univ Genoa, INSTM, I-16146 Genoa, Italy

[4] CNR, IMEM, Sez Genova, I-16146 Genoa, Italy

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2005年 / 80卷 / 03期

关键词：

DTA-TG; EGA; phase stability; ruthenates; superconductivity;

D O I：

10.1007/s10973-005-0697-3

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A thermal study was performed on the RuSr2GdCu2O8 (Ru- 1212) magnetic superconductor phase to investigate the effect of the annealing treatments in flowing O-2 on the stability limit of the phase and on its structural, magnetic and transport properties. DTA-TG measurements were utilized to determine the decomposition process and the dependence of the decomposition temperature on the annealing atmosphere. The decomposition of the Ru-1212 phase was found sensitive to the oxygen partial pressure and increases with P-o2, and the annealing time. The annealing treatments exert a depressing effect on the strength of the magnetic interaction, an enhancement on the superconductive properties and the vanishing of the magnetostriction. A decomposition reaction of Ru- 1212 phase was proposed and discussed.

引用

页码：579 / 583

页数：5

共 27 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, 2003, ADV SCI TECHNOLOGY, P77

[3] Comparison of magneto-superconductive properties of RuSr2GdCu2O8-δ and RuSr2Gd1.5Ce0.5Cu2O10-δ [J].

Awana, VPS ;

Ichihara, S ;

Karppinen, M ;

Yamauchi, H .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2002, 378 :249-254

[4]

AWANA VPS, 2003, INT BOOK SERIES STUD, V46, P77

[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] Dissociation pressure and standard dissociation enthalpy of RuO2 [J].

Brunetti, B ;

Scardala, P ;

Piacente, V .

MATERIALS CHEMISTRY AND PHYSICS, 2004, 83 (01) :145-149

[7] CRYSTALLIZATION OF HIGH-TEMPERATURE SUPERCONDUCTORS FROM NONSTOICHIOMETRIC MELTS [J].

BYKOV, AB ;

DEMIANETS, LN ;

ZIBROV, IP ;

KANUNNIKOV, GV ;

MELNIKOV, OK ;

STISHOV, SM .

JOURNAL OF CRYSTAL GROWTH, 1988, 91 (03) :302-307

[8] OXYGEN STOICHIOMETRY, SUPERCONDUCTIVITY AND NORMAL-STATE PROPERTIES OF YBA2CU3O7-DELTA [J].

CAVA, RJ ;

BATLOGG, B ;

CHEN, CH ;

RIETMAN, EA ;

ZAHURAK, SM ;

WERDER, D .

NATURE, 1987, 329 (6138) :423-425

[9] Dependence of the structural and physical properties of Ru-1212 compound on the thermal treatment and oxygen content [J].

Cimberle, MR ;

Masini, R ;

Gilioli, E ;

Artini, C ;

Costa, GA ;

Ferretti, M ;

Mele, P ;

Martinelli, A .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 408 :187-188

[10] Magnetic properties of RSr2RuCu2O8+δ (R = Eu and Gd) [J].

Felner, I ;

Asaf, U ;

Reich, S ;

Tsabba, Y .

PHYSICA C, 1999, 311 (3-4) :163-171

← 1 2 3 →