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. Author manuscript; available in PMC: 2011 Sep 11.
Published in final edited form as: J Am Chem Soc. 2009 Aug 12;131(31):11213–11221. doi: 10.1021/ja903847a

Figure 9.

Figure 9

Temperature dependence of the effective magnetic moment of solid [Co4S4(PPri3)4] measured at applied field B = 1 T. The solid line represents a generic spin Hamiltonian simulation with four spins: Si = 3/2, i = 1–4, arranged in pyramidal topology with one unique site (spin 1) and two different exchange coupling constants J = −600 cm−1 for the interactions (1–2), (1–3), and (1–4), and J' = −100 cm−1 for (2–3), (3–4), and (4–2). Other parameters are g1 = 2.27, g234 = 2.0, Di = 0, ΘW = 0.7 K. Inset: multi-field variable-temperature measurement of magnetization. The solid lines represent spin Hamiltonian simulations obtained with St = 3, gt = 1.90, Di = −1.95, E/Di = 0.2, ΘW = 0.7 K.