UNUSUAL BROADENING OF MOSSBAUER LINES IN OXYGEN-REDUCED SUPERCONDUCTING CERAMIC YBA2(CU1-XFEX)3OY NEAR T=110 K

被引：4

作者：

AFANASEV, AM

TSYMBAL, EY

CHEREPANOV, VM

CHUEV, MA

YAKIMOV, SS

ZINN, W

SAUER, C

BUSH, AA

机构：

[1] INST FESTKORPERFORSCH FORSCHUNGSZENTRUMS,W-5170 JULICH,GERMANY

[2] MOSCOW RADIOENGN ELECTR & AUTOMAT INST,MOSCOW 117454,USSR

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 76卷 / 09期

关键词：

D O I：

10.1016/0038-1098(90)90972-E

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A sharp peak in the temperature dependence of the Mössbauer effect linewidth in YBa2(Cu1-x57Fex)3O6.8 (x=0.017) near T=110K has been found for the first time. At this temperature some structural instabilities have been observed before. The Lorentz shape character of this line broadening suggests that the fluctuation time of the nearest neighbour oxygen anions of the iron atoms in chain positions passes through the Mössbauer time scale window of ≈10-9-10-7s by cooling the sample from ≈140K to ≈90K. © 1990.

引用

页码：1099 / 1102

页数：4

共 19 条

[1]

AFANASEV AM, 1989, IAE489010 AT INF PRE

[2]

AFANASEV AM, IN PRESS

[3]

BOOLCHAND P, 1990, STUDIES HIGH TEMPERA, V4, P143

[4] ON THE MOSSBAUER SITE ASSIGNMENT IN YBA2(CU1-XFEX)3OY [J].

BRAND, RA ;

SAUER, C ;

LUTGEMEIER, H ;

MEUFFELS, PM ;

ZINN, W .

HYPERFINE INTERACTIONS, 1990, 55 (1-4) :1229-1242

[5]

CHEREPANOV VM, 1988, JETP LETT+, V47, P424

[6] PHONON SOFTENING NEAR SUPERCONDUCTING TRANSITION-TEMPERATURES IN HIGH-TC CERAMICS [J].

CHEREPANOV, VM ;

CHUEV, MA ;

YAKIMOV, SS ;

GONCHAROV, VY .

PHYSICA B, 1990, 163 (1-3) :441-442

[7]

FRANCOIS M, 1990, SOLID STATE COMMUN, V66, P1147

[8]

GOLDANSKII VI, 1968, CHEMICAL APPLICATION, pCH1

[9]

GOLOVASHKIN AI, 1987, JETP LETT+, V46, P410

[10] ORTHORHOMBIC DISTORTION AT THE SUPERCONDUCTING TRANSITION IN YBA2CU3O7 - EVIDENCE FOR ANISOTROPIC PAIRING [J].

HORN, PM ;

KEANE, DT ;

HELD, GA ;

JORDANSWEET, JL ;

KAISER, DL ;

HOLTZBERG, F ;

RICE, TM .

PHYSICAL REVIEW LETTERS, 1987, 59 (24) :2772-2775

← 1 2 →