SPIN-DENSITY AND FORM-FACTOR MEASUREMENTS ON HTSC COPPER OXIDES

被引：3

作者：

GILLON, B

机构：

[1] Laboratoire Léon Brillouin (C.E.A.-C.N.R.S.), C.E.N. Saclay

来源：

PHYSICA B | 1991年 / 174卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(91)90626-P

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polarized neutron investigations on superconducting copper oxides, La2-xSrxCDO4 and YBa2Cu3O6+x, as well as studies of related antiferromagnetic compounds, using unpolarized neutrons, permit some of the characteristic features of the spin distribution to be outlined. No covalency on the in-plane oxygen atoms is observed, neither in the antiferromagnetic state, nor in the superconducting state. In superconducting compounds, the in-plane copper displays a small induced magnetic moment, about 10(-3)mu-B (H = 5 T), which is almost independent of temperature. In YBa2Cu3O6+x, a distinct behaviour is found for the in-chain copper. The induced spin density in HoBa2Cu3O7 exhibits specific features that are not present in non-superconducting HoBa2Cu3O6.5.

引用

页码：340 / 348

页数：9

共 25 条

[11] NMR EVIDENCE FOR LOCALIZED SPINS ON CU(2) SITES FROM CU NMR IN YBA2CU3O7 AND YBA2CU3O6.75 SINGLE-CRYSTALS [J].

HORVATIC, M ;

SEGRANSAN, P ;

BERTHIER, C ;

BERTHIER, Y ;

BUTAUD, P ;

HENRY, JY ;

COUACH, M ;

CHAMINADE, JP .

PHYSICAL REVIEW B, 1989, 39 (10) :7332-7335

[12] NEUTRON AND MAGNETIZATION STUDY OF LA1.8SR0.2NIO4 [J].

LANDER, GH ;

BROWN, PJ ;

STASSIS, C ;

GOPALAN, P ;

SPALEK, J ;

HONIG, G .

JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) :4869-4871

[13] STRUCTURAL AND MAGNETIZATION DENSITY STUDIES OF LA2NIO4 [J].

LANDER, GH ;

BROWN, PJ ;

SPALEK, J ;

HONIG, JM .

PHYSICAL REVIEW B, 1989, 40 (07) :4463-4471

[14] BAND-THEORETICAL STUDY OF MAGNETISM IN SC2CUO4 [J].

LEUNG, TC ;

WANG, XW ;

HARMON, BN .

PHYSICAL REVIEW B, 1988, 37 (01) :384-388

[15] MAXIMUM-ENTROPY RECONSTRUCTION OF SPIN-DENSITY MAPS IN CRYSTALS FROM POLARIZED NEUTRON-DIFFRACTION DATA [J].

PAPOULAR, RJ ;

GILLON, B .

EUROPHYSICS LETTERS, 1990, 13 (05) :429-434

[16]

PAPOULAR RJ, 1990, I PHYS C SER, V107, P101

[17] A NEW WAY OF INVESTIGATION OF MAGNETIC-FIELD PENETRATION IN RBACUO SUPERCONDUCTORS BY POLARIZED NEUTRON-DIFFRACTION ON RARE-EARTH [J].

PETITGRAND, D ;

GILLON, B ;

DELAPALME, A ;

COLLIN, G ;

SCHWEISS, P .

PHYSICA C, 1989, 162 :1271-1272

[18] COEXISTENCE OF SUPERCONDUCTIVITY (TC = 55-K) AND ANTIFERROMAGNETISM (TN = 230-K) IN YBA2CU3O6.55 SINGLE-CRYSTAL [J].

PETITGRAND, D ;

COLLIN, G ;

SCHWEISS, P ;

HADJOUDJ, S ;

SENOUSSI, S .

JOURNAL DE PHYSIQUE, 1988, 49 (11) :1815-1820

[19] NEUTRON-DIFFRACTION STUDIES OF ELECTRON-SPIN PAIRING IN SUPERCONDUCTING V3SI [J].

SHULL, CG ;

WEDGWOOD, FA .

PHYSICAL REVIEW LETTERS, 1966, 16 (12) :513-&

[20]

SINHA SK, IN PRESS

← 1 2 3 →