LA-139 NMR-STUDY OF PHASE-SEPARATION IN SINGLE-CRYSTAL LA2CUO4+DELTA

被引：69

作者：

HAMMEL, PC

REYES, AP

FISK, Z

TAKIGAWA, M

THOMPSON, JD

HEFFNER, RH

CHEONG, SW

SCHIRBER, JE

机构：

[1] SANDIA NATL LABS,ALBUQUERQUE,NM 87185

[2] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.42.6781

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a study of single-crystal La2CuO4+, a 38-K superconductor produced by high-pressure oxygenation. We employ La139 NMR to probe the behavior of copper spins in the CuO2 planes. At low temperatures we observe two signals, one originating from regions of the crystal rich in oxygen and a second having no excess oxygen (0). Upon warming through 265 5 K, the volume fraction of the crystal poor in oxygen goes to zero. The magnetic shift of the peak intensity of the line originating in the oxygen-rich portion of the crystal does not change in the vicinity of 265 K. These observations provide direct microscopic evidence for phase separation in the crystal. © 1990 The American Physical Society.

引用

页码：6781 / 6783

页数：3

共 13 条

[1] MAGNETIC-PROPERTIES OF THE SUPERCONDUCTING SUPEROXIDE LA2CUO4+DELTA [J].

ANSALDO, EJ ;

BREWER, JH ;

RISEMAN, TM ;

SCHIRBER, JE ;

VENTURINI, EL ;

MOROSIN, B ;

GINLEY, DS ;

STERNLIEB, B .

PHYSICAL REVIEW B, 1989, 40 (04) :2555-2557

[2] STRUCTURAL ASPECTS OF THE PHASE-SEPARATION IN LA2CUO4.032 [J].

CHAILLOUT, C ;

CHENAVAS, J ;

CHEONG, SW ;

FISK, Z ;

LEHMANN, MS ;

MAREZIO, M ;

MOROSIN, B ;

SCHIRBER, JE .

PHYSICA C, 1989, 162 :57-58

[3] THE CRYSTAL-STRUCTURE OF SUPERCONDUCTING LA2CUO4.032 BY NEUTRON-DIFFRACTION [J].

CHAILLOUT, C ;

CHEONG, SW ;

FISK, Z ;

LEHMANN, MS ;

MAREZIO, M ;

MOROSIN, B ;

SCHIRBER, JE .

PHYSICA C, 1989, 158 (1-2) :183-191

[4]

CHAILLOUT C, COMMUNICATION

[5] PROPERTIES OF LA2CUO4 AND RELATED-COMPOUNDS [J].

CHEONG, SW ;

THOMPSON, JD ;

FISK, Z .

PHYSICA C, 1989, 158 (1-2) :109-126

[6] PHASE-SEPARATION IN THE T-J MODEL [J].

EMERY, VJ ;

KIVELSON, SA ;

LIN, HQ .

PHYSICAL REVIEW LETTERS, 1990, 64 (04) :475-478

[7]

HAMMEL PC, UNPUB

[8] PHASE-SEPARATION IN A HIGH-PRESSURE-OXYGENATED LA2CUO4+DELTA CRYSTAL - EVIDENCE FROM ANISOTROPIC ELECTRONIC TRANSPORT AND MAGNETIC-SUSCEPTIBILITY [J].

HUNDLEY, MF ;

THOMPSON, JD ;

CHEONG, SW ;

FISK, Z ;

SCHIRBER, JE .

PHYSICAL REVIEW B, 1990, 41 (07) :4062-4065

[9]

JORGENSEN JD, 1988, PHYS REV B, V38, P337

[10] NQR AND NMR OF LA-139 IN ANTIFERROMAGNETIC LA2CUO4-DELTA [J].

NISHIHARA, H ;

YASUOKA, H ;

SHIMIZU, T ;

TSUDA, T ;

IMAI, T ;

SASAKI, S ;

KANBE, S ;

KISHIO, K ;

KITAZAWA, K ;

FUEKI, K .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1987, 56 (12) :4559-4570

← 1 2 →