Static and dynamic magnetic properties and effect of surface chemistry on the morphology and crystallinity of DyCrO3 nanoplatelets

Preeti Gupta, Richa Bhargava, Raja Das, Pankaj Poddar

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

In this contribution, the structural and magnetic properties of DyCrO 3 nanoplatelets, synthesized by a hydrolytic sol-gel method, have been investigated. The crystalline phase of DyCrO3 was attained at the decomposition temperature of 800 °C for citric acid and oxalic acid, respectively and their structural analysis indicates a distorted orthorhombic perovskite structure of the DyCrO3 nanoplatelets. The dc-magnetization curve shows the Néel temperature of ∼144 and ∼146 K for DyCrO3 nanoplatelets synthesized using citric acid (DCO (C)) and oxalic acid (DCO (O)), respectively. In addition, DCO (O) shows weak anomalies at ∼22 and ∼6 K in the zero-field-cooled and field-cooled magnetization curves. Below the Néel temperature, DCO (C) and DCO (O) exhibit cross-over from positive to negative magnetization at ∼143 and ∼145 K, respectively. This was attributed to a Dy3+-Cr 3+ interaction, which resulted in a weak ferromagnetic coupling (seen as a small opening in the M-H curves). The low temperature transition observed at ∼6 K can be assigned to the onset of Dy3+-Dy3+ antiferromagnetic interaction.

Original languageEnglish
Pages (from-to)26427-26432
Number of pages6
JournalRSC Advances
Volume3
Issue number48
DOIs
Publication statusPublished - 28 Dec 2013
Externally publishedYes

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