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Thermodynamic study on perovskite-type layer compounds: [NH3(CH2)nNH3]mCl4(cr) (m = Mn, Cd; n = 3,5) at low temperatures

1988; Elsevier BV; Volume: 20; Issue: 12 Linguagem: Inglês

10.1016/0021-9614(88)90038-9

1096-3626

L. Abello, K. Chhor, C. Pommier, C. Sourisseau,

Nonlinear Optical Materials Research

Heat-capacity measurements have been performed on [NH3(CH2)3NH3]CdCl4(cr). A lattice heat-capacity model using spectroscopic quantities was developed to study the disordering process of the alkyl chains in this compound and analogous [NH3(CH2)nNH3]MnCl4 derivatives (n = 3,5) above 200 K. A magnetic transition previously suspected around 50 K in [NH3(CH2)3NH3]MnCl4 has been definitely found.