Thermodynamic properties of the fully unconstrained noncollinear magnetisms

Magnetic property of a spin-5/2 trigonal prismatic as a model for a molecule-based compound Cs4Na7[Fe6(OH)3(A-α-GeW9O34(OH)3)2]・30H2O

“…For three dimensional(3D) spin systems, due to the limited spins, the interaction of spins are related to different low-dimensional systems, and the methods, adopted for LD systems, show limitation to 3D systems due to the short periodicity. However, the new method adopted in our former works [19,20] resolved 3D systems successfully while the results shown were in good agreement with the experiments. For 3D systems, Bi LH and co-workers [6] synthesized the complex of Cs 4 Na 7 [Fe 6 (OH) 3 (A-α-GeW 9 O 34 (OH) 3 ) 2 ]·30H 2 O with sextet S=5/2 Fe atoms.…”

“…As two interesting topics in condensed state physics, ferromagnetic and anti-ferromagnetic spin systems have been attracting much more attention from both experimental [1][2][3][4][5][6][7][8][9][10][11][12] and theoretical points of view [13][14][15][16][17][18][19][20][21][22][23][24] , due to the notable progress in synthesizing bulk samples of identical molecular-size units. The relatively small number of paramagnetic ions (''spins''), mutually interacting via Heisenberg exchange interactions through organic bridge, are contained in the great majority of cases.…”

“…Compared to the intra-molecular exchange interactions, the intermolecular magnetic interactions in the cases can be ignored [25] . With the prominent feature, the discrete magnetic energy level spectra are coming to light for the magnetic properties measurement of crystalline samples, in which isolated individual molecules are contained arising from finite number of magnetic ions [18,19,[25][26][27][28][29][30] to infinite numbers [20][21][22][23][24] . It is well known that the magnetic transition temperature Tc of metalfree molecule-based magnets that are still liquid genuine ferromagnets with high transition temperature are still hard experimental works.…”