Oxygen-isotope effect on the field-induced metal-insulator transition in Pr2/3Ca1/3MnO3

被引：16

作者：

Garcia-Landa, B ^{[1
]}

Ibarra, MR

De Teresa, JM

Zhao, GM

Conder, K

Keller, H

机构：

[1] Univ Zaragoza, CSIC, Fac Ciencias, Dept Fis Mat Condensada, Zaragoza 50009, Spain

[2] Univ Zaragoza, CSIC, Fac Ciencias, Inst Ciencia Mat Aragon, Zaragoza 50009, Spain

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

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 105卷 / 09期

关键词：

D O I：

10.1016/S0038-1098(97)10197-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Resistivity and magnetostriction measurements have been performed on the oxygen-isotope substituted (O-16 and O-18) samples of Pr2/3Ca1/3MnO3 under magnetic fields up to 12 Tesla. Without applying magnetic field, both isotope samples have qualitatively similar transport and lattice properties, showing a crossover from a charge localised (CL) to a charge ordered (CO) state at the same temperature. In both isotope samples, there is an insulator to metal (I-M) transition induced by a magnetic field, but the magnetic field that induces the I-M transition is much higher for the O-18 sample than for the O-16 sample. Our results show that a heavier oxygen isotope mass favours the insulating state and that the CO transition has no significant correlation with the lattice dynamics. (C) 1998 Elsevier Science Ltd.

引用

页码：567 / 570

页数：4

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