Reentrant transition from an incipient charge-ordered state to a ferromagnetic metallic state in a rare-earth manganate

被引：41

作者：

Arulraj, A ^{[1
]}

Biswas, A

Raychaudhuri, AK

Rao, CNR

Woodward, PM

Vogt, T

Cox, DE

Cheetham, AK

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[2] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India

[3] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[4] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.57.R8115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A reentrant transition from an incipient charge-ordered (CO) state to a charge-delocalized ferromagnetic (CDFM) state has been established in the manganate Nd0.25La0.25Ca0.5MnO3, in which the average A-site ionic radius is 1.19 Angstrom. The reentrant CDFM phase is associated with a first-order phase transition that reduces the orthorhombic distortion of the lattice, in contrast to the CO transition in other manganates where the orthorhombically distorted CO state is stabilized at low temperatures. At the CO-CDFM transition, there is a collapse of the charge-ordering gap as measured by vacuum tunneling spectroscopy.

引用

页码：R8115 / R8118

页数：4

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