Itinerant to localized electronic behavior in phase segregated ruthenates

被引：7

作者：

Dalal, Biswajit ^{[1
]}

Sarkar, Babusona ^{[1
]}

De, S. K. ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Mat Sci, Kolkata 700032, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 667卷

关键词：

Griffiths phase; FERROMAGNET SRRUO3; TRANSPORT-PROPERTIES; PHYSICAL-PROPERTIES; HIGH-PRESSURE; BARUO3; MAGNETIZATION; SUBSTITUTION; CONDUCTIVITY; SITE;

D O I：

10.1016/j.jallcom.2016.01.162

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Simultaneous doping of Ba and Zr for Sr and Ru in SrRuO3 leads to phase separation of orthorhombic SrRuO3 (SRO) and nine layer rhombohedral BaRuO3 (9R-BRO). Differences in ionic radius and electronegativity between the cations are responsible for the chemical phase separation with increase of doping concentration. Random substitution of Ru by Zr localizes electron and induces Metal-Insulator (M-I) transition for lower doping concentration (5% and 10%). Electron-electron interaction dominates electrical conduction process due to cationic disorder in SRO lattice. Dilution of ferromagnetic interaction due to non-magnetic element Zr decreases both Curie temperature and Curie-Wiess constant and produces Griffiths phase just above the Curie temperature. At higher doping concentration (40%), solid solution of ruthenates reveals magnetism purely related to 9R-BRO phase. (c) 2016 Elsevier B.V. All rights reserved.

引用

页码：248 / 254

页数：7

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