Magnetic properties of mixed spin (1/2,1) Ising nanoparticles

[摘要] Mixed spin 2D-nanoparticles (circle and square) with core - shell structure consisting of spin 1/2 and spin 1 distributed in concentric and two alternate rings are investigated by the use of the finite cluster approximation (FCA). In this approach, the state equations are derived. The effects of the exchange interactions on the phase diagrams are systematically discussed. A number of interesting phenomena have been found, in particular, the transition temperature is not too sensitive of shell exchange interaction where the spins S are strongly correlated.

[发布机构] Laboratory of High Energy Physics and Scientific Computing, HASSAN II University-Casablanca, Faculty of Sciences-Aïn Chock, B.P: 5366 Maarif, Casablanca; 20100, Morocco^1

[效力级别] 能源学 [学科分类] 材料科学（综合）

[关键词] Core shell structure;Finite clusters;Mixed spins;Spin 1/2;State equations