NEUTRON-DIFFRACTION STUDY OF PR VALENCE AND OXYGEN ORDERING IN THE Y1-XPRXBA2CU3O7-DELTA SYSTEM

被引：139

作者：

NEUMEIER, JJ

BJORNHOLM, T

MAPLE, MB

RHYNE, JJ

GOTAAS, JA

机构：

[1] UNIV CALIF SAN DIEGO,INST PURE & APPL PHYS SCI,LA JOLLA,CA 92093

[2] NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899

来源：

PHYSICA C | 1990年 / 166卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(90)90572-V

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The crystallographic changes that occur with increasing Pr concentration in the Y-xPrxBa2Cu3O7-δ system have been studied by neutron diffraction. As x is increased from 0 to 1, the orthorhombic a, b and c lattice parameters expand monotonically, while the orthorhombic distortion, espressed as b a, decreases, reflecting increased occupation of O(5) sites at the expense of O(4) chain site occupancy. The separation of the CuO2 planes in PrBa2Cu3O7-δ indicates that the Pr ions have an intermediate valence of ∼3.3 in this compound. Evidence is presented for increased interaction between the Pr ions and oxygen ions in adjacent CuO2 planes. © 1990.

引用

页码：191 / 196

页数：6

共 27 条

[1]

ALP EE, 1988, MATERIALS RES SOC S, V99, P177

[2] SUPERCONDUCTING AND NORMAL STATE PROPERTIES OF Y1-XPRXBA2CU307-DELTA, Y1-XNAXBA2CU307-DELTA [J].

DALICHAOUCH, Y ;

TORIKACHVILI, MS ;

EARLY, EA ;

LEE, BW ;

SEAMAN, CL ;

YANG, KN ;

ZHOU, H ;

MAPLE, MB .

SOLID STATE COMMUNICATIONS, 1988, 65 (09) :1001-1006

[3] 3-DIMENSIONAL ANTIFERROMAGNETIC ORDERING IN THE LIGHT RARE-EARTH HIGH-TC SUPERCONDUCTOR NDBA2CU3O6.86 [J].

FISCHER, P ;

SCHMID, B ;

BRUESCH, P ;

STUCKI, F ;

UNTERNAHRER, P .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1989, 74 (02) :183-189

[4]

GHAMATY S, UNPUB

[5] CRYSTAL-STRUCTURE OF 90-K SUPERCONDUCTOR, ORTHOHOMBIC PHASE OF LABA2CU3OY DETERMINED BY RIETVELD ANALYSIS OF X-RAY-POWDER DIFFRACTION DATA [J].

IZUMI, M ;

UCHINOKURA, K ;

MAEDA, A ;

TANAKA, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1987, 26 (09) :L1555-L1557

[6]

KANG JS, 1989, J LESS-COMMON MET, V24, P25

[7] MAGNETIC-ORDERING AND SUPERCONDUCTIVITY IN Y1-XPRXBA2CU3O7-Y [J].

KEBEDE, A ;

JEE, CS ;

SCHWEGLER, J ;

CROW, JE ;

MIHALISIN, T ;

MYER, GH ;

SALOMON, RE ;

SCHLOTTMANN, P ;

KURIC, MV ;

BLOOM, SH ;

GUERTIN, RP .

PHYSICAL REVIEW B, 1989, 40 (07) :4453-4462

[8] CRYSTAL-STRUCTURE AND SUPERCONDUCTIVITY IN BA2Y1-XPRXCU3O7-Y [J].

KINOSHITA, K ;

MATSUDA, A ;

SHIBATA, H ;

ISHII, T ;

WATANABE, T ;

YAMADA, T .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1988, 27 (09) :L1642-L1645

[9] THE SUPERCONDUCTIVE PROPERTIES AND CRYSTAL-STRUCTURE OF BA2(Y1-XPRX)CU3O9-Y SOLID-SOLUTIONS [J].

LIANG, JK ;

XU, XT ;

XIE, SS ;

RAO, GH ;

SHAO, XY ;

DUAN, ZG .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1987, 69 (2-3) :137-140

[10]

LOPEZMORALES ME, UNPUB

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