University of Oulu

Phys. Chem. Chem. Phys., 2023,25, 3144-3150,

Unveiling the correlation between structural and magnetic ordering in nano Co1−xNixTeO4

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Author: Patel, Akhilesh Kumar1; Samatham, S. Shanmukharao2; Rani, Ekta3;
Organizations: 1Department of Physics, Indian Institute of Technology Bombay, Mumbai 400 076, India
2Department of Physics, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad 500 075, India
3Nano and Molecular Systems Research Unit, University of Oulu, FIN-90014, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.4 MB)
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Language: English
Published: Royal Society of Chemistry, 2022
Publish Date: 2023-08-10


Nanomaterials with unique structures and exotic magnetic phenomena are always intriguing; however, the direct correlation of structural and magnetic ordering up to a few nanometers remains critical. We report structural and magnetic properties of sol–gel grown Co1−xNixTeO4 (x = 0, 0.5 and 1) nanoparticles. An increase in the calcination temperature leads to the enhancement of the particle size and structural ordering. This is accompanied by changes in the magnetic interactions as well. Calcination at lower temperatures retains the short-range non-crystalline structure and superparamagnetic behavior, while calcination at higher temperatures results in long-range ordering in both the crystal and magnetic structures. Superparamagnetic to antiferromagnetic ordering observed from temperature- and field-dependent magnetization is attributed to the changes in structural ordering. This study presents a new family of nanomaterials displaying stable magnetic order up to ∼6 nm, where the magnetic properties can be uniquely controlled by changing the structural ordering.

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Series: PCCP. Physical chemistry chemical physics
ISSN: 1463-9076
ISSN-E: 1463-9084
ISSN-L: 1463-9076
Volume: 25
Issue: 4
Pages: 3144 - 3150
DOI: 10.1039/d2cp05592a
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: H. S. acknowledges the Science & Engineering Research Board, DST, India, for support under NPDF project PDF/2016/001159. E. R. and H. S. also acknowledge The Academy of Finland (grant #311934) for the financial supports.
Copyright information: © The Author(s) 2022. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.