Single-crystal neutron-diffraction structures of reduced and oxygenated Nd2-xCexCuOy

被引：102

作者：

Schultz, AJ

Jorgensen, JD

Peng, JL

Greene, RL

机构：

[1] ARGONNE NATL LAB,SCI & TECHNOL CTR SUPERCONDUCT,ARGONNE,IL 60439

[2] UNIV MARYLAND,DEPT PHYS & ASTRON,CTR SUPERCONDUCT RES,COLLEGE PK,MD 20742

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.53.5157

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structures of single crystals of oxygenated and reduced (T-c=24 K) Nd1.85Ce0.15CuOy (y approximate to 4) were examined by neutron diffraction. Although refinements of various models including interstitial oxygen atoms was inconclusive, Fourier maps of the oxygenated crystal exhibit peaks at the apical O(3) oxygen site. This peak is almost entirely absent in the superconducting reduced crystal. These results are consistent with results from a previous study of oxygenated and reduced Nd2CuOy.

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页码：5157 / 5159

页数：3

相关论文

共 15 条

[1] NEUTRON AND ELECTRON-DIFFRACTION STUDY OF THE ELECTRON-DOPED SUPERCONDUCTOR ND1.845CE0.155CUO4-Y [J].

IZUMI, F ;

MATSUI, Y ;

TAKAGI, H ;

UCHIDA, S ;

TOKURA, Y ;

ASANO, H .

PHYSICA C, 1989, 158 (03) :433-439

[2] THE PHASE-STABILITY DIAGRAMS FOR THE SYSTEMS ND2CUO4-DELTA AND ND1.85CE0.15CUO4-DELTA [J].

KIM, JS ;

GASKELL, DR .

PHYSICA C, 1993, 209 (04) :381-388

[3] STRUCTURE AND OXYGEN STOICHIOMETRY FOR THE ELECTRON-DOPED CUPRATE SUPERCONDUCTOR ND1.85CE0.15CUO4-DELTA [J].

KWEI, GH ;

CHEONG, SW ;

FISK, Z ;

GARZON, FH ;

GOLDSTONE, JA ;

THOMPSON, JD .

PHYSICAL REVIEW B, 1989, 40 (13) :9370-9373

[4] CHEMICAL SIGNATURE OF THE SUPERCONDUCTING PHASE IN THE ND-CE-CU-O SYSTEM [J].

NATH, A ;

KOPELEV, NS ;

CHECHERSKY, V ;

PENG, JL ;

GREENE, RL ;

O, BH ;

LARKIN, MI ;

MARKERT, JT .

SCIENCE, 1994, 265 (5168) :73-74

[5]

Pauling L., 1973, NATURE CHEM BOND

[6] GROWTH AND CHARACTERIZATION OF HIGH-QUALITY SINGLE-CRYSTALS OF R2-XCEXCUO4-Y (R = ND, SM) [J].

PENG, JL ;

LI, ZY ;

GREENE, RL .

PHYSICA C, 1991, 177 (1-3) :79-85

[7] EVIDENCE OF APICAL OXYGEN IN ND2CUO(Y) DETERMINED BY SINGLE-CRYSTAL NEUTRON-DIFFRACTION [J].

RADAELLI, PG ;

JORGENSEN, JD ;

SCHULTZ, AJ ;

PENG, JL ;

GREENE, RL .

PHYSICAL REVIEW B, 1994, 49 (21) :15322-15326

[8] STRUCTURE OF METHYLENECYCLOPROPANE-2-CARBOXAMIDE BY TIME-OF-FLIGHT NEUTRON-DIFFRACTION [J].

SCHULTZ, AJ ;

VANDERVEER, DG ;

PARKER, DW ;

BALDWIN, JE .

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1990, 46 :276-279

[9]

SCHULTZ AJ, 1993, T AM CRYSTALLOGR ASS, V29, P29

[10] OXYGEN NONSTOICHIOMETRY OF THE (ND, CE)2CUO4-DELTA SYSTEM [J].

SUZUKI, K ;

KISHIO, K ;

HASEGAWA, T ;

KITAZAWA, K .

PHYSICA C, 1990, 166 (3-4) :357-360