ANELASTIC RELAXATION EVIDENCE OF VERY LOW ACTIVATION-ENERGY PROCESSES IN SUPERCONDUCTING YBA2CU3O7-X - MAGNETIC CHAIN EXCITATIONS

被引：20

作者：

ALMOND, DP ^{[1
]}

LONG, MW ^{[1
]}

SAUNDERS, GA ^{[1
]}

机构：

[1] UNIV BATH,SCH MAT SCI,BATH BA2 7AY,AVON,ENGLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 21期

关键词：

D O I：

10.1088/0953-8984/2/21/001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Relaxation rates obtained from a wide range of acoustic loss measurements are explained by introducing three thermally activated processes controlled by activation energies of 0.06, 0.14 and 0.2 eV in superconducting YBa 2Cu3O7-x. The ultrasonic attenuation peak magnitudes indicate that the interactions responsible originate in at least 10% of unit cells in the bulk of the material. An analysis of spin excitations on the copper-oxygen chains is presented that leads to a series of discrete excitation energies matching those obtained experimentally.

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页码：4667 / 4674

页数：8

相关论文

共 21 条

[1] AN ULTRASONIC STUDY OF SUPERCONDUCTING AND NON-SUPERCONDUCTING GDBA2CU3O7-X [J].

ALMOND, DP ;

WANG, OX ;

FREESTONE, J ;

LAMBSON, EF ;

CHAPMAN, B ;

SAUNDERS, GA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1989, 1 (38) :6853-6864

[2] ULTRASONIC-ATTENUATION STUDIES OF SOLID ELECTROLYTES [J].

ALMOND, DP ;

WEST, AR .

SOLID STATE IONICS, 1988, 26 (04) :265-278

[3] BULK-MODULUS ANOMALIES AT THE SUPERCONDUCTING TRANSITION OF SINGLE-PHASE YBA2CU3O7 [J].

BISHOP, DJ ;

RAMIREZ, AP ;

GAMMEL, PL ;

BATLOGG, B ;

RIETMAN, EA ;

CAVA, RJ ;

MILLIS, AJ .

PHYSICAL REVIEW B, 1987, 36 (04) :2408-2410

[4] NEW ANELASTIC RELAXATION EFFECT IN Y-BA-CU-O AT LOW-TEMPERATURE - A SNOEK-TYPE PEAK DUE TO OXYGEN DIFFUSION [J].

CANNELLI, G ;

CANTELLI, R ;

CORDERO, F .

PHYSICAL REVIEW B, 1988, 38 (10) :7200-7202

[5] THE RELATIONSHIP BETWEEN THE PHASE-TRANSITION-LIKE ANOMALIES ABOVE TC AND SUPERCONDUCTIVITY IN YBA2CU3OX [J].

CHENG, XH ;

SUN, LH ;

WANG, YN ;

SHEN, HM ;

YU, Z .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1988, 21 (25) :4603-4609

[6] REENTRANT SOFTENING IN PEROVSKITE-LIKE SUPERCONDUCTORS [J].

DATTA, T ;

LEDBETTER, HM ;

VIOLET, CE ;

ALMASAN, C ;

ESTRADA, J .

PHYSICAL REVIEW B, 1988, 37 (13) :7502-7505

[7] SOUND-ATTENUATION AND VELOCITY IN SUPERCONDUCTIVE CERAMICS - A REVIEW [J].

DOMINEC, J .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1989, 2 (02) :91-102

[8] ANOMALIES IN THE INTERNAL-FRICTION AND SOUND-VELOCITY IN YBA2CU3O7-X AND EUBA2CU3O7-X SUPERCONDUCTORS [J].

DURAN, C ;

ESQUINAZI, P ;

FAINSTEIN, C ;

REGUEIRO, MN .

SOLID STATE COMMUNICATIONS, 1988, 65 (09) :957-961

[9] ELASTIC EFFECTS OF STRUCTURAL RELAXATION IN GLASSES AT LOW-TEMPERATURES [J].

JACKLE, J ;

PICHE, L ;

ARNOLD, W ;

HUNKLINGER, S .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1976, 20 (03) :365-391

[10]

LEMMENS P, 1990, IN PRESS PHYSICA C