Abstract
The modificated Mn-porphyrin magnet [Mn(OC12H25)4TPP][TCNE]* solvent orders ferromagnetically at Tc = 22 K. Close to Tc transition to the spin glass-like state occurs. The coercive field Hc at T = 2.3 K equals 21 kOe but decreases quickly with temperature. In the paper the low temperature magnetization curves are investigated. The observed field induced magnetization jump we identify as the spin flop which is the transition from the longitudinal to the transverse spin glass state. The transition may come from the sign change of the anisotropy constant. The critical field for the transition decreases with temperature and equals zero for T > 7.5 K. Above 7.5 K magnetic uniaxial anisotropy is lost and a single ion anisotropy favours the ferromagnetic ordering of spins.
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