Colossal oxygen isotope shift of the charge-ordering transition in Nd0.5Sr0.5MnO3

被引：28

作者：

Zhao, GM ^{[1
]}

Ghosh, K

Greene, RL

机构：

[1] Univ Maryland, Dept Phys, Ctr Superconduct Res, College Pk, MD 20742 USA

[2] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1998年 / 10卷 / 47期

关键词：

D O I：

10.1088/0953-8984/10/47/001

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A 'colossal' oxygen isotope shift of the charge-ordering temperature was discovered in Nd0.5Sr0.5MnO3. Upon replacing O-16 with O-18, the charge-ordering temperature increases by 21 K under zero magnetic field. With an increase of the magnetic field, the oxygen isotope shift increases rapidly and reaches a magnitude of about 43 K under a magnetic field of 5.4 T. The very strong magnetic field dependence of the oxygen isotope effect is difficult to explain within the existing theories of the charge-ordering transition in manganites.

引用

页码：L737 / L742

页数：6

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