PRESSURE-INDUCED STRUCTURAL-CHANGES IN SUPERCONDUCTING HGBA2CAN-1CUNO2N+2+DELTA (N = 1, 2, 3) COMPOUNDS

被引：139

作者：

HUNTER, BA

JORGENSEN, JD

WAGNER, JL

RADAELLI, PG

HINKS, DG

SHAKED, H

HITTERMAN, RL

VONDREELE, RB

机构：

[1] NUCL RES CTR NEGEV,DEPT PHYS,IL-84190 BEER SHEVA,ISRAEL

[2] BEN GURION UNIV NEGEV,DEPT PHYS,IL-84105 BEER SHEVA,ISRAEL

[3] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

[4] LOS ALAMOS NATL LAB,MANUEL LUJAN JR NEUTRON SCATTERING CTR,LOS ALAMOS,NM 87545

来源：

PHYSICA C | 1994年 / 221卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90659-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The crystal structures of superconducting HgBa2CuO4+delta and HgBa2CaCu2O6+delta have been investigated with a pressure up to 0.6 GPa and HgBa2Ca2Cu3O8+delta to 9.2 GPa by neutron powder diffraction. The compressibility along the c-axis is nearly the same for the three compounds and up to two times larger than the compressibility along the a-axis. The one-layer compound, HgBa2CuO4+delta, shows the largest a-axis compressibility, while HgBa2Ca2Cu3O4+delta shows the smallest compressibility. The bond compressibilities of HgBa2CuO4+delta and HgBa2CaCu2O6+delta are significantly different from HgBa2Ca2Cu3O8+delta bond compressibilities. In the one- and two-layer compounds the largest bond compressibility was the Cu-O2 (apical) bond distance, while for the three-layer compound it was the Hg-O2 bond distance.

引用

页码：1 / 10

页数：10

共 48 条

[1] EXPERIMENTALLY OBSERVED EXTENDED SADDLE-POINT SINGULARITY IN THE ENERGY-SPECTRUM OF YBA2CU3O6.9 AND YBA2CU4O8 AND SOME OF THE CONSEQUENCES [J].