Title :
Magnetic properties of M3(AsO4)2·8H2O (M=Co, Ni)
Author :
Melero, Julio J. ; Burriel, Ramón ; Lezama, Luis ; García-Tojal, Javier ; Rojo, Teófilo
Author_Institution :
Inst. de Ciencia de Mater. de Aragon, Zaragoza Univ., Spain
fDate :
3/1/1994 12:00:00 AM
Abstract :
Magnetic susceptibility and heat-capacity measurements of Co3 (AsO4)2·8H2O and Ni3 (AsO4)2·8H2O have shown the existence of long range antiferromagnetic ordering at 7.1 and 8.3 K, respectively. The analysis of the measurements together with the structural features have shown a stronger ferromagnetic dimers interaction. The ordering of the Co compound has been characterized as a planar one with S=1/2 and having a three-dimensional crossover below 2 K. For the Ni compound the magnetic ordering at TN is three-dimensional Heisenberg with S=1
Keywords :
Neel temperature; antiferromagnetic properties of substances; cobalt compounds; magnetic susceptibility; nickel compounds; specific heat of solids; 2 to 8.3 K; Co3(AsO4)2·8H2 O; Co3(AsO4)2H2O; M3(AsO4)2·8H2O; Ni(As2O4)2H2O; Ni3(AsO4)2·8H2 O; ferromagnetic dimer interaction; heat-capacity; long range antiferromagnetic ordering; magnetic properties; magnetic susceptibility; three-dimensional Heisenberg ordering; three-dimensional crossover; Atmospheric measurements; Cobalt; Extraterrestrial measurements; Magnetic field measurement; Magnetic moments; Magnetic properties; Magnetic susceptibility; Nickel; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
