Gadolinium compounds magnetization

Magnetic resonance imaging (MRI)-enhancing gadolinium compounds... 

Magnetic resonance imaging with gadolinium compounds. 

The unenhanced magnetic resonance imaging (MRI) (described in Chapter 3) of tumors cannot always reliably distinguish tumors from normal tissue. However, gadolinium compounds targeted... 

Although this is calculated in principal from magnetization data, it can be difficult to obtain in practice because it requires a maximum in -ASM versus T to be observed. This is uncommon in gadolinium (III) compounds under certain laboratory conditions because of their weak interactions. RC characterizes the performance of a material more fully across a greater range of temperatures than simply - ASm, although the two are obviously related. 

Givord D., Givord F., Lemaire R. (1971) Magnetic properties of iron compounds with yttrium, lutetium and gadolinium. J. Phys. (Paris) 32, Cl-668. 

Gadolinium(iii) compounds are especially suited to this. The Gd + ion has a large number of unpaired electrons S = 7/2) and moreover its magnetic properties are isotropic. It has a relatively long electron-spin relaxation time, 10 s, which makes it more suitable than other very paramagnetic ions such as Dy +, Eu +, and Yb + s). These factors are... 

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