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Issue 24, 2015
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Hydrothermal synthesis of single crystal CoAs2O4 and NiAs2O4 compounds and their magnetic properties

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Abstract

The crystal structures of the hydrothermally synthesised trippkeite-related materials, CoAs2O4 and NiAs2O4 were investigated by means of single-crystal X-ray diffraction, Raman and infrared spectroscopy. The obtained compounds crystallise in the tetragonal crystal system (P42/mbc), with unit cell parameters at 293 K of a = 8.34530(10)/8.2277(12) Å, c = 5.62010(10)/5.6120(11) Å, V = 391.406(12)/379.90(13) Å3, Z = 4, for CoAs2O4 and NiAs2O4 respectively. Magnetic measurements show that the resulting single crystal of NiAs2O4 exhibits an antiferromagnetic transition at TN = 53 K in a high magnetic field of 10 kOe, as already reported in the literature. The single crystal of CoAs2O4 reveals an interplay between ferromagnetic and a canted antiferromagnetic interactions resulting in a canted antiferromagnetic state which occurs at 105 K – the highest critical temperature among all similar structures.

Graphical abstract: Hydrothermal synthesis of single crystal CoAs2O4 and NiAs2O4 compounds and their magnetic properties

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Supplementary files

Article information


Submitted
10 Dec 2014
Accepted
05 Feb 2015
First published
05 Feb 2015

This article is Open Access

RSC Adv., 2015,5, 18280-18287
Article type
Paper
Author version available

Hydrothermal synthesis of single crystal CoAs2O4 and NiAs2O4 compounds and their magnetic properties

T. Đorđević, A. Wittwer, Z. Jagličić and I. Djerdj, RSC Adv., 2015, 5, 18280
DOI: 10.1039/C4RA16122J

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