Electrical Properties of Heavily Doped Fluorite-Structured BaF2:RF3 (R = La, Pr, Nd, Gd, Tb, Y, Sc) Single Crystals

被引：10

作者：

Trnovcova, V. ^{[1
,2
]}

Sorokin, N. I. ^{[3
]}

Fedorov, P. P. ^{[3
]}

Krivandina, E. A. ^{[3
]}

Sramkova, T. ^{[2
]}

Sobolev, B. P. ^{[3
]}

机构：

[1] Slovak Univ Technol, Fac Mat Sci & Technol, SK-91724 Trnava, Slovakia

[2] Slovak Acad Sci, Inst Phys, SK-84228 Bratislava, Slovakia

[3] Russian Acad Sci, Shubnikovs Inst Crystallog, Moscow 117333, Russia

来源：

IONICS | 2000年 / 6卷 / 5-6期

关键词：

D O I：

10.1007/BF02374152

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The superionic conductivity and dielectric response of heavily doped fluorite-structured Ba1-xRxF2+x (R = La, Pr, Nd, Gd, Tb, Y, Sc; x = 0.005 - 0.45) crystals are reported. The highest ionic conductivity is found for R = Sc and x = 0.1. Upon ScF3 doping, small Sc3+ ions rearrange their surroundings, create excessive fluoride interstitial ions and bring about a high ionic conductivity. For each dopant, the concentration dependence of the ionic conductivity is non-linear. A monotonous concentration dependence of the ionic conductivity is found only for La3+ doping. Upon doping with Nd3+, Gd3+, Tb3+, Y3+ and Sc3+ ions, a conductivity maximum is observed at x = 0.1 - 0.2. Upon Pr3+ doping, this maximum is split. The influence of defect clustering on the concentration dependence of the conductivity is discussed.

引用

页码：351 / 358

页数：8

共 26 条

[1]

ALEXANDROV VB, 1991, B SOC CATALANA CIEN, V12, P333

[2] Defect structure of cubic solid solutions of alkaline earth and rare earth fluorides [J].

DenHartog, HW .

RADIATION EFFECTS AND DEFECTS IN SOLIDS, 1996, 139 (02) :125-145

[3]

Fedorov P. P., 1991, BUTTL SOC CAT CIEN, V12, P349

[4] IONIC-CONDUCTIVITY IN THE SINGLE-CRYSTALS OF NONSTOICHIOMETRIC FLUORITE PHASES M1-XRXF2+X (M=CA,SR,BA, R=Y,LA-LU) [J].

FEDOROV, PP ;

TURKINA, TM ;

SOBOLEV, BP ;

MARIANI, E ;

SVANTNER, M .

SOLID STATE IONICS, 1982, 6 (04) :331-335

[5] The influence of the rare-earth concentration (R=La, Ce, Pr, Nd; 0.22<=x<=0.5) on the defect structure of the nonstoichiometric phases Ba1-xRxF2+x [J].

Fykin, LE ;

Otroschenko, LP ;

Alexandrov, VB ;

Sobolev, BP .

PHYSICA B, 1997, 234 :121-123

[6] A STRUCTURAL MODEL FOR FLUORIDE IONIC TRANSPORT IN BA1-XHOXF2+X SOLID-SOLUTIONS (HI-GREATER-THAN-OR-EQUAL-TO 0.1) [J].

GOLUBEV, AM ;

IVANOVSHITS, AK ;

SIMONOV, VI ;

SOBOLEV, BP ;

SOROKIN, NI ;

FEDOROV, PP .

SOLID STATE IONICS, 1990, 37 (2-3) :115-121

[7]

GOLUBEV AM, 1985, KRISTALLOGRAFIYA+, V30, P314

[8] SPECIFIC FEATURES OF ION-TRANSPORT IN NONSTOICHIOMETRIC SR1-XRXF2+X PHASES (R=LA-LU, Y) WITH THE FLUORITE-TYPE STRUCTURE [J].

IVANOVSHITS, AK ;

SOROKIN, NI ;

FEDOROV, PP ;

SOBOLEV, BP .

SOLID STATE IONICS, 1989, 31 (04) :253-268

[9] SPECIFIC FEATURES OF IONIC TRANSPORT IN NONSTOICHIOMETRIC FLUORITE-TYPE CA1-XLAXF2+X, CA1-XLUXF2+X, CA1-XYXF2+X, CA1-X5CXF2+X PHASES [J].

IVANOVSHITS, AK ;

SOROKIN, NI ;

FEDOROV, PP ;

SOBOLEV, BP .

SOLID STATE IONICS, 1990, 37 (2-3) :125-137

[10] CONDUCTIVITY OF FLUORINE ION IN THE SOLID-SOLUTION PB1-XSNXF2 [J].

LUCAT, C ;

RHANDOUR, A ;

COT, L ;

REAU, JM .

SOLID STATE COMMUNICATIONS, 1979, 32 (02) :167-169

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