Neutron-diffraction pattern observed in YBa2Cu3O6.35: No better explanation than oxygen ordering

被引：5

作者：

Aligia, AA

Eroles, JM

机构：

[1] COMIS NACL ENERGIA ATOM,CTR ATOM BARILOCHE,RA-8400 SAN CARLOS BARILO,RIO NEGRO,ARGENTINA

[2] COMIS NACL ENERGIA ATOM,INST BALSEIRO,RA-8400 SAN CARLOS BARILO,RIO NEGRO,ARGENTINA

来源：

PHYSICA C | 1996年 / 272卷 / 3-4期

关键词：

D O I：

10.1016/S0921-4534(96)00588-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have looked for the best possible fit of the neutron-diffraction data of YBa2Cu3O6.35 measured by Sonntag et al. [Phys. Rev. Lett. 66 (1990) 1497] using the deformation modulated structure for CuO2 planes proposed by Krekels, Kaesche and Van Tendeloo [Physica C 248 (1995) 317]. The resulting fit is bad. We discuss the reasons of this failure. The best explanation of the neutron data is given by the structure obtained by Aligia [Europhys. Lett. 18 (1992) 181] from the thermodynamics of oxygen ordering. Using a simple highly-correlated electronic model, we also show that there are no theoretical grounds to discard 2 root 2 x 2 root 2 oxygen ordered superstructures. Recent nuclear-quadrupole-resonance spectra support this conclusion.

引用

页码：197 / 203

页数：7

共 46 条

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PHYSICA C, 1992, 190 (03) :234-248

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