Exchange interactions of Er3+ in the ab plane for ErxY1-xBa2Cu3O7-δ:: An EPR linewidth study

被引：9

作者：

Likodimos, V

Guskos, N ^{[1
]}

Garmari-Seale, H

Wabia, M

Typek, J

机构：

[1] Univ Athens, Solid State Sect, Dept Phys, GR-15784 Athens, Greece

[2] NCSR Demokritos, GR-15310 Athens, Greece

[3] Tech Univ Szczecin, Inst Phys, PL-70310 Szczecin, Poland

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.58.14223

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electron paramagnetic resonance (EPR) linewidth of Er3+ in ErxY1-xBa2Cu3O7-delta (delta approximate to 1) is studied as a function of Er concentration. The EPR spectrum complies with the crystal-field ground doublet, while linewidth analysis shows the presence of exchange narrowing. Comparison of the theoretical EPR linewidth with the experimental data provide evidence for the presence of nearest-neighbor exchange interactions of the order of 1 K, most probably anisotropic along the a and b crystallographic axes. [S0163-1829(98)04345-8].

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页码：14223 / 14226

页数：4

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