ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The magnetic properties of a quasi-two-dimensional mixed ferromagnetic and antiferromagnetic system, stage-2 CocMn1−cCl2 -graphite intercalation compounds (GICs), have been studied by dc magnetic susceptibility measurements. The Curie–Weiss temperature determined as a function of Co concentration indicates that the intraplanar exchange interaction between Co2+ and Mn2+ is ferromagnetic and that J(Co-Mn)=1.3 [J(Co-Co)||J(Mn-Mn)||]1/2. With decreasing Co concentration c, the transition temperature tends to decrease to zero as c approaches 0.5 (the percolation concentration for the triangular lattice sites), but is not reduced to zero even below c=0.5. There may be a possibility of a spin-glass phase for 0≤c〈0.4 arising from the competition between J(Mn-Mn), J(Co-Mn), and J(Mn-Mn).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.345951
