Magnetic measurements intermetallic compound

Magnetically ordered intermetallic compounds of the rare earths with iron and tin have been the subject of numerous investigations, reflecting the relative ease of carrying out Mossbauer effect measurements with these two convenient nuclei ( Fe and " Sn). A variety of pseudo-binary systems may also be formed (e.g., R(FeiCoi i)2) in which the iron or tin may be diluted without altering the crystal structure. 

Concerning induced orbital moments of U-based intermetallic compounds, many PND experiments have been performed and have shown that the ratio iL/ -is can be used as a measure of the hybridisation [42-44] (in the light actinides, orbital and spin moments are oppositely directed and the neutron magnetic form factors are highly sensitive to the ratio uL/us). Indeed, this ratio is reduced as compared to the free ion expectations (Figure 4). 

Photo ESP measurements have been reported for the series of intermetallic compounds US, USe and UTe (21). The ESP for these compounds is negative for all b m. The magnetic moment of uranium compounds is predominately determined by the occupied 5f electrons. However, the photoyield of the f-electrons at photon energies less that 11 eV is very small relative to s, p or d electron yields. Thus, the observed photoelectron spin... 

Fig. 15. Field dependence of the magnetization at 4.2 K and 290 K in several ternary intermetallic compounds measured on single crystals. (After Nakagawa et al. 1987.)...

In the second chapter (94) of the present volume, Dormann reviews the advances that have been made in NMR spectroscopy over the past 12 years, since Barnes overview on NMR, EPR and Mossbauer effect, in volume 2 of the HANDBOOK. Dormann s contribution is more specialized since it concentrates on NMR in inter-metallic, magnetically ordered compounds. As Dormann points out, considerable progress has been made in experimental techniques which enable experimentalists to study materials and perform measurements that could not have been done ten years ago, and this has led to a much better understanding and comprehension of these magnetic lanthanide materials. These experimental advances allow the determination of the temperature dependence of spontaneous magnetization, direction of easy magnetization, and the electronic structure of intermetallic compounds with non-magnetic components. 

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