Metal-like to insulator transition in Lu3Fe5O12

被引：12

作者：

Manimuthu, P. ^{[1
]}

Mariam, M. N. Jamal Ghousia ^{[1
]}

Murugaraj, R. ^{[2
]}

Venkateswaran, C. ^{[1
]}

机构：

[1] Univ Madras, Dept Nucl Phys, Madras 600025, Tamil Nadu, India

[2] Anna Univ, Dept Phys, Madras 600044, Tamil Nadu, India

来源：

PHYSICS LETTERS A | 2014年 / 378卷 / 20期

关键词：

Rare earth iron garnet; Lu(3)Fes(5)O(12); Oxygen vacancy; Electrical property; Magnetic property;

D O I：

10.1016/j.physleta.2014.03.018

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Polycrystalline Lu3Fe5O12, prepared using the solid state reaction method, has Fe in the mixed valence state as inferred from the X-ray photoelectron spectroscopy. A spectral change in the impedance plot at 343 K is attributed to metal-like to insulator transition (MIT), which is analyzed in terms of localized and delocalized e(g) electrons. The change in the slope at 343 K in the DC conductivity plot also proves the MIT. The dependence of Z' on temperature and Z" on frequency clearly substantiates the presence of localized electrons up to 343 K and delocalized electrons above 343 K. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1402 / 1406

页数：5

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