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Structural, magnetic, and magnetodielectric studies of metamagnetic DyFe0.5Cr0.5O3

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Title Structural, magnetic, and magnetodielectric studies of metamagnetic DyFe0.5Cr0.5O3
 
Creator NAIR, VG
PAL, L
SUBRAMANIAN, V
SANTHOSH, PN
 
Subject PEROVSKITE
DYCRO3
 
Description We present here the detailed structural, magnetic, and magnetodielectric properties of polycrystalline DyFe0.5Cr0.5O3. Rietveld refinement reveals that DyFe0.5Cr0.5O3 crystallizes in an orthorhombic structure, with Pnma space group, having a disordered arrangement of Fe and Cr ions. An anomaly observed around 250 K in the temperature dependence of magnetization indicates an onset of magnetic ordering. The field dependent magnetization of DyFe0.5Cr0.5O3 at 13 K, 120 K, and 240 K has a small loop indicating weak ferromagnetic nature and the corresponding curve at 5 K indicates a metamagnetic behavior. The small loop and the unsaturated magnetization even for a high applied magnetic field of 7 T indicate a canted antiferromagnetic structure, the canting can be explained due to Dzyaloshinsky-Moriya antisymmetric exchange interaction. The temperature dependence of the dielectric permittivity shows a transition around 500 K. An anomaly in the temperature dependence of magnetization (supported by differential scanning calorimetry) corresponding to this dielectric transition suggests the possibility of magnetodielectric effect in DyFe0.5Cr0.5O3. (C) 2014 AIP Publishing LLC.
 
Publisher AMER INST PHYSICS
 
Date 2014-12-28T10:58:52Z
2014-12-28T10:58:52Z
2014
 
Type Article
 
Identifier JOURNAL OF APPLIED PHYSICS, 115(17)
0021-8979
1089-7550
http://dx.doi.org/10.1063/1.4870139
http://dspace.library.iitb.ac.in/jspui/handle/100/16300
 
Language English