TY - JOUR
T1 - An investigation of structural, magnetic and dielectric properties of R2NiMnO6 (R = rare earth, Y)
AU - Booth, R. J.
AU - Fillman, R.
AU - Whitaker, H.
AU - Nag, Abanti
AU - Tiwari, R. M.
AU - Ramanujachary, K. V.
AU - Gopalakrishnan, J.
AU - Lofland, S. E.
N1 - Funding Information:
We thank Mamata Tripathy for her help with the synthesis of R 2 NiMnO 6 oxides. JG thanks the Department of Science and Technology, Government of India, for the award of a Ramana Fellowship. KVR appreciates the support of DST, Government of India, for the award of a CP-STIO fellowship. SEL acknowledges support by the University of Maryland NSF MRSEC DMR 0520471.
Copyright:
Copyright 2009 Elsevier B.V., All rights reserved.
PY - 2009/7/1
Y1 - 2009/7/1
N2 - 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 (P21/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 (φ) in the double perovskite structure. These results are consistent with all samples having Mn4+ and Ni2+ with minimal antisite disorder.
AB - 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 (P21/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 (φ) in the double perovskite structure. These results are consistent with all samples having Mn4+ and Ni2+ with minimal antisite disorder.
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U2 - 10.1016/j.materresbull.2009.02.003
DO - 10.1016/j.materresbull.2009.02.003
M3 - Article
AN - SCOPUS:67349131148
SN - 0025-5408
VL - 44
SP - 1559
EP - 1564
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 7
ER -