spin susceptibility
1.It is obvious from experimental results that ln ρ is linear against T -1/2 . With increasing acidity of protonic acids ,doping concentration and the synthesizing concentration of dopant, the resistivity of the samples decreases, and the magnetic susceptibility can be written as a sum of a temperature independent Pauli spin susceptibility term and a Curie law term.
2.Variable-temperature (4. 2～300k) magnetic susceptibility measurements ars recorded for[(VO)_2(TPHA)(H_2O)_2(Me_2bpy)_2] (Ac)_2. The exchange integral, J,is found to be-42. 7cm~(-1). This indicates ah antiferromagnetic spin-exchange interaction between the VO(Ⅱ) ions.
