MAGNETIC ORDERED STATES IN THE OXYGEN-DEFICIENT YBA2(CU1-XFEX)3OY-LESS-THAN-6.5 SYSTEM

被引：24

作者：

LYUBUTIN, IS ^{[1
]}

TERZIEV, VG ^{[1
]}

LUCHKO, SV ^{[1
]}

SHAPIRO, AY ^{[1
]}

BALAGUROV, AM ^{[1
]}

BONCHOSMOLOVSKIY, GA ^{[1
]}

机构：

[1] JOINT NUCL RES INST,DUBNA 141980,RUSSIA

来源：

PHYSICA C | 1992年 / 199卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(92)90414-8

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetically ordered states in the oxygen-deficient YBa2(CU1-xFex)3Oy<6.5 system (0.01 less-than-or-equal-to x less-than-or-equal-to 0.30) have been studied by Mossbauer spectroscopy. Magnetic ordering of Fe atoms is found at Cu(1) sites as well as at Cu(2) sites. At small iron concentrations x less-than-or-equal-to 0.05 the Cu(1) and Cu(2) sublattices are not coupled magnetically and two magnetic phase transitions are observed: the low-temperature transition for the Cu(1) sublattice at T(m1) almost-equal-to 20 K and the high-temperature transition for the Cu(2) sublattice at T(m2) almost-equal-to 400 K. With increasing iron concentration at x greater-than-or-equal-to 0.10 a strong coupling between the Cu(1) and Cu(2) sublattices appears and the whole matrix is ordered antiferromagnetically with a single magnetic ordering point T(m2) almost-equal-to 460 K. The phase diagrams showing the regions of existence of different magnetic phases versus iron concentration are plotted for the oxygen-saturated and oxygen-reduced YBa2(CU1-xFex)3Oy systems.

引用

页码：296 / 304

页数：9

共 27 条

[21]

Nowik I., 1991, Modern Physics Letters B, V5, P273, DOI 10.1142/S0217984991000319

[22] THE COEXISTENCE OF MAGNETIC-ORDERING AND SUPERCONDUCTIVITY IN YBA2(CU0.94FE0.06)3O9-DELTA [J].