An investigation of structural, magnetic and dielectric properties of R2NiMnO6 (R = rare earth, Y)

被引：193

作者：

Booth, R. J. ^{[1
]}

Fillman, R. ^{[1
]}

Whitaker, H. ^{[2
]}

Nag, Abanti ^{[3
]}

Tiwari, R. M. ^{[3
]}

Ramanujachary, K. V. ^{[2
]}

Gopalakrishnan, J. ^{[3
]}

Lofland, S. E. ^{[1
]}

机构：

[1] Rowan Univ, Dept Phys & Astron, Glassboro, NJ 08028 USA

[2] Rowan Univ, Dept Chem & Biochem, Glassboro, NJ 08028 USA

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

来源：

MATERIALS RESEARCH BULLETIN | 2009年 / 44卷 / 07期

关键词：

Oxides; X-ray diffraction; Magnetic properties; Dielectric properties; PEROVSKITES; NI; ORDER; LA; LN;

D O I：

10.1016/j.materresbull.2009.02.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the structure, magnetic and dielectric properties of the double perovskite oxides, R2NiMnO6 (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho and Y). We could refine powder X-ray diffraction patterns of all the phases on the basis of monoclinic (P2(1)/n) double perovskite structure where Ni and Mn atoms are ordered at 2c and 2d sites, respectively. All the phases are ferromagnetic insulators exhibiting relatively low dielectric loss and dielectric constants in the range 15-25. The ferromagnetic ordering temperature of the R2NiMnO6 series seems to correlate better with the radius of R3+ atoms than with the average Ni-O-Mn angle (phi) in the double perovskite structure. These results are consistent with all samples having Mn4+ and Ni2+ With minimal antisite disorder. (c) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1559 / 1564

页数：6

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