Structural characterization, thermal, spectroscopic and magnetic studies of the (C3H12N2)0.75[Mn1.50IIFe1.50III(AsO4)F6] and (C3H12N2)0.75[Co1.50IIFe1.50III(AsO4)F6] compounds
作者:B. Bazán、J.L. Mesa、A. Peña、E. Legarra、J.L. Pizarro、M.I. Arriortua、T. Rojo
DOI:10.1016/j.materresbull.2007.05.016
日期:2008.5
symmetry. The calculated Dq and B-Racah parameters for the cobalt(II) phase are 710 and 925 cm −1 , respectively. The ESR spectra of compound 1 maintain isotropic with variation in temperature, being g = 1.99. Magnetic measurements for both compounds indicate that the main magnetic interactions are antiferromagnetic in nature. However, at low temperatures small ferromagnetic components are detected, which
摘要 (C 3 H 12 N 2 ) 0.94 [Mn 1.50 Fe 1.50 III (AsO 4 )F 6 ] 和 (C 3 H 12 N 2 ) 0.75 [Co 1.50 Fe 1.50 III (AsO 4 )F 6 ] 化合物 1 和2 是在温和的水热条件下合成的。这些相与 (C 3 H 12 N 2 ) 0.75 [Fe 1.5 II Fe 1.5 III (AsO 4 )F 6 ] 同构。这些化合物在正交伊玛目空间群中结晶。使用 FULPROOF 程序的模式匹配程序计算的晶胞参数,从铁(II),(III)相的晶胞参数开始,为:a = 7.727(1) A, b = 11.047(1) A , c = 13.412(1) A for 1 and a = 7.560(1) A, b = 11.012(1) A, c = 13.206(1) A for 2,两种化合物中的 Z =