Structural and magnetic studies of the electron doped manganites Sr0.65Pr0.35-xCexMnO3 (0.00 ≤ x ≤ 0.35)

被引：5

作者：

Heyraud, Severine ^{[1
]}

Blanchard, Peter E. R. ^{[1
]}

Liu, Samuel ^{[1
]}

Zhou, Qingdi ^{[1
]}

Kennedy, Brendan J. ^{[1
]}

Brand, Helen E. A. ^{[2
]}

Tadich, Anton ^{[2
]}

Hester, James R. ^{[3
]}

机构：

[1] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia

[2] Australian Synchrotron, Clayton, Vic 3168, Australia

[3] Australian Nucl Sci & Technol Org, Bragg Inst, Kirrawee Dc, NSW 2232, Australia

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2013年 / 25卷 / 33期

基金：

澳大利亚研究理事会;

关键词：

PHASE-TRANSITIONS; CATION DISORDER; MANGANESE; TEMPERATURE; SIZE; MAGNETORESISTANCE; DIFFRACTION; INSULATOR;

D O I：

10.1088/0953-8984/25/33/335401

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The nuclear and magnetic structures and properties of Sr0.65Pr0.35-xCexMnO3 (0.00 <= x <= 0.35) were investigated using a combination of synchrotron x-ray and neutron powder diffraction, along with magnetic and x-ray absorption near edge structure measurements. At room temperature, doping with Ce results in a transition from a tetragonal structure in I4/mcm to an orthorhombic one in Imma associated with the loss of long range orbital ordering. At low temperatures, we observe the formation of an orthorhombic Fmmm phase. XANES measurements demonstrate that the Ce exists as a mixture of Ce3+ and Ce4+.

引用

页数：10

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