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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14792
Title: Multiferroic behaviour in B-site Cr-doped hexagonal YInO 3 perovskites: Synthesis, structure and properties
Authors: Naveen K.
Kumar N.
Mandal, Tapas Kumar
Babu P.D.
Siruguri V.
Maji, Pradip K.
Paul A.K.
Published in: Journal of Molecular Structure
Abstract: New phase pure multiferroic oxides, YIn 1-x Cr x O 3 (x = 0.1, 0.3, 0.5), are synthesized by glycine–aided sol-gel combustion technique using binary oxides and nitrates. YIn 0.9 Cr 0.1 O 3 (I), YIn 0.7 Cr 0.3 O 3 (II) and YIn 0.5 Cr 0.5 O 3 (III) are investigated through powder X-ray diffraction (PXRD), elemental analysis (EDAX), magnetization and polarisation studies. Crystal structure analysis reveals that the sample with 10% Cr 3+ (compound I) crystallizes in hexagonal P6 3 cm space group with a = 6.28035 and c = 12.533 Å. The samples with higher concentration of Cr 3+ (compounds II and III) crystallize with a mixture of hexagonal and orthorhombic phases. From the detailed magnetic measurements, the compounds are found to exhibit dominating antiferromagnetic behaviour with Neel temperatures of 140, 130 and 125 K for I, II and III, respectively. The Curie-Weiss fittings provide different θ values and the effective magnetic moment, μ eff (2.60 μ B , to 4.23μ B ), gradually increases with increasing Cr 3+ concentration. The observed values indicate that the spins are not perfectly aligned antiparallel, rather the system exhibits canted antiferromagnetic (AFM) behaviour with weak ferromagnetic interactions. The existence of magnetic ordering is also confirmed by the presence of hysteresis loop below the Neel temperature. The room temperature ferroelectric polarisation loops are indicative of the multiferroic nature of the synthesized compounds. The work reveals the significant role of Cr 3+ substitution for structural evolution and enhanced multiferroic behaviour in YIn 1-x Cr x O 3 . © 2019 Elsevier B.V.
Citation: Journal of Molecular Structure (2019), 1185(): 432-439
URI: https://doi.org/10.1016/j.molstruc.2019.02.099
http://repository.iitr.ac.in/handle/123456789/14792
Issue Date: 2019
Publisher: Elsevier B.V.
Keywords: Cr-doped
Crystal structure
Multiferroic behaviour
Perovskite
Sol-gel method
ISSN: 222860
Author Scopus IDs: 57196344881
57201756182
57200780613
7102668023
6603868711
56249287900
15758201500
Author Affiliations: Naveen, K., Department of Chemistry, National Institute of Technology Kurukshetra, Kurukshetra, 136119, India
Kumar, N., Department of Chemistry, National Institute of Technology Kurukshetra, Kurukshetra, 136119, India
Mandal, T.K., Department of Chemistry & Centre of Nanotechnology, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Babu, P.D., UGC-DAE Consortium for Scientific Research Mumbai Centre, 246-C CFB, BARC Campus, Mumbai, 400085, India
Siruguri, V., UGC-DAE Consortium for Scientific Research Mumbai Centre, 246-C CFB, BARC Campus, Mumbai, 400085, India
Maji, P.K., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur, 247001, India
Paul, A.K., Department of Chemistry, National Institute of Technology Kurukshetra, Kurukshetra, 136119, India
Funding Details: The authors thank the Department of Science and Technology, Government of India , for INSPIRE Faculty Award (No. IFA14-CH-144 ). The Science and Engineering Research Board (SERB), Government of India , is also thanked for the award of Fast Track startup grant (No. SB/FT/CS-098/2014 ). This research was supported in part by SERB .
Corresponding Author: Paul, A.K.; Department of Chemistry, National Institute of Technology KurukshetraIndia; email: apaul@nitkkr.ac.in
Appears in Collections:Journal Publications [CY]
Journal Publications [PE]

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