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

Autor(en)

Tamara Đorđević, Astrid Wittwer, Zvonco Jaglicic, Igor Djerdj

Abstrakt

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(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

University of Ljubljana, Rudjer Boskovic Institute

Journal

RSC Advances

Band

5

Seiten

18280-18287

Anzahl der Seiten

8

ISSN

2046-2069

DOI

https://doi.org/10.1039/c4ra16122j

Publikationsdatum

02-2015

Peer-reviewed

Ja

ÖFOS 2012

104011 Materialchemie, 105113 Kristallographie

ASJC Scopus Sachgebiete

Chemical Engineering(all), Chemistry(all)

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/hydrothermal-synthesis-of-single-crystal-coas2o4-and-nias2o4-compounds-and-their-magnetic-properties(7d23dcf9-656d-4033-ac0a-a3a338df1124).html