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Effect of Dy-doping on the microstructure and magnetic properties of Y1−xDyxMnO3

Published online by Cambridge University Press:  29 May 2013

A.M. Zhang ,
G.T. Zhou ,
J. Sun ,
T. Xu ,
L.L. Guo  and
X.S. Wu
A.M. Zhang*
Affiliation:
College of Science, Hohai University, Nanjing 210098, China
G.T. Zhou
Affiliation:
College of Science, Hohai University, Nanjing 210098, China
J. Sun
Affiliation:
College of Science, Hohai University, Nanjing 210098, China
T. Xu
Affiliation:
College of Science, Hohai University, Nanjing 210098, China
L.L. Guo
Affiliation:
College of Science, Hohai University, Nanjing 210098, China
X.S. Wu
Affiliation:
Lab of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, China
*
a)Author to whom correspondence should be addressed. Electronic mail: njuhhu@163.com
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Abstract

The effect of Dy3+ doping at A-site in hexagonal YMnO3 on the microstructure and magnetic properties was studied. Polycrystalline Y1−xDyxMnO3 samples with x ranging from 0 to 1 were synthesized by the solid-state reaction method. The microstructures of all the samples were studied by X-ray diffraction, which shows that Y1−xDyxMnO3 with a low concentration (x ≤ 0.5) of Dy3+ retains a hexagonal symmetry. The crystal structure refinements of the hexagonal Y1−xDyxMnO3 using the Rietveld method show that the unit-cell parameters of a, c, and unit-cell volume increase with increasing Dy doping, while the MnO5 trigonal bipyramids remain almost unchanged. The remarkable increasing of magnetic moment at a low temperature with increasing the Dy3+ doping concentration is ascribed to the spin order of Dy3+ and the increasing Dy3+–Mn3+ coupling and Mn3+–O–O–Mn3+ interaction.

Keywords

multiferroicscrystal structureX-ray diffraction
Type
Technical Articles
Information
Powder Diffraction , Volume 28 , Supplement S1 , September 2013 , pp. S45 - S49
Copyright
Copyright © International Centre for Diffraction Data 2013 

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