MAGNETIZATION MEASUREMENTS AND MOSSBAUER-SPECTROSCOPY IN IRON DOPED YBA2CU4O8

被引：10

作者：

BORNEMANN, HJ

MORRIS, DE

CHUEV, MA

CHELEPANOV, VM

机构：

[1] MORRIS RES INC,1918 UNIV AVE,BERKELEY,CA 94704

[2] IV KURCHATOV ATOM ENERGY INST,MOSCOW 123182,USSR

来源：

PHYSICA C | 1992年 / 199卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(92)90549-R

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effects of Fe doping in the high-temperature superconductor YBa2Cu3.975Fe0.025O8 have been studied by Fe-57 Mossbauer spectroscopy and by magnetization measurements. The Mossbauer spectrum consists of a single quadrupole doublet. Both the quadrupole splitting and the isomer shift are close to the values obtained for Fe on Cu(2) sites in the Fe doped 1:2:3 compound, indicating that for low dopant concentration, Fe in 1:2:4 goes primarily to Cu(2) sites. Magnetic measurements show that Fe is in the high spin Fe3+ state (configuration 3d(5)4s0). Apparently, the Fe d-orbitals are well localized and do not mix with the oxygen p orbitals.

引用

页码：130 / 134

页数：5

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