Magnetic susceptibility transition metals

The magnetic properties of individual transition metal ions in compounds and complexes are considered in (5ee Magnetism of Transition Metal lon. There, the properties of a given ion are assumed to be independent of the presence of any other ions. However, the possibility of /TU/jor interactions between ions is taken into account in those cases in which the temperature dependence of the inverse magnetic susceptibility deviates from the Curie law. This was accomplished by inclusion of the Weiss constant and the generation of the Curie-Weiss law. The properties of extended arrays of this type may be primarily understood in terms of single ions, and they will not be discussed here. 

The first part of the present volume complements and extends the collection of magnetic susceptibility data for coordination and organometallic transition metal compounds which was presented in the volumes II/2, II/8, II/IO and II/ll of the Landolt-Bornstein, New Series [137,138,139,140]. The literature covered here adds directly onto that included in the previous volume [140] and extends through the end of 1974. It is of interest to note that the magnetic data compiled in this volume equal to 68.7 % of the total amount of data in the volume. The corresponding number for volume II/IO which covers the years 1969 and 1970 is about 76 %. This comparison indicates a stabilization of research activities in the general area of the magnetism of transition metal compounds. 

On the general theory of magnetic susceptibilities of polynuclear transition metal compounds. J. S. Griffith, Struct. Bonding (Berlin), 1972,10, 87-126 (43). 

Griffith, J. S. On the General Theory of Magnetic Susceptibilities of Polynuclear Transition-metal Compounds. Vol. 10, pp. 87—126. 

Six [Ln(Pc)2] complexes with heavy lanthanide ions (Ln = Tb, Dy, Ho, Er, Tm or Yb) were investigated by the measurements of alternating current (AC) magnetic susceptibility [18]. Out of the six compounds, [TbPc2] and [DyPc2] were found to show temperature and frequency dependence on AC magnetic susceptibility similar to that observed for the transition-metal SMMs, while the rest did not. Their SMM behaviour have been observed either in bulk, in dilute solid solutions... 

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