Hydrothermal synthesis of single crystal CoAs<sub>2</sub>O<sub>4</sub> and NiAs<sub>2</sub>O<sub>4</sub> compounds and their magnetic properties
- Author(s)
- Tamara Đorđević, Astrid Wittwer, Zvonco Jaglicic, Igor Djerdj
- 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.
- Organisation(s)
- Department of Mineralogy and Crystallography
- External organisation(s)
- University of Ljubljana, Rudjer Boskovic Institute
- Journal
- RSC Advances
- Volume
- 5
- Pages
- 18280-18287
- No. of pages
- 8
- ISSN
- 2046-2069
- DOI
- https://doi.org/10.1039/c4ra16122j
- Publication date
- 02-2015
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 104011 Materials chemistry, 105113 Crystallography
- ASJC Scopus subject areas
- Chemical Engineering(all), Chemistry(all)
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/hydrothermal-synthesis-of-single-crystal-coas2o4-and-nias2o4-compounds-and-their-magnetic-properties(7d23dcf9-656d-4033-ac0a-a3a338df1124).html