Studies of magnetic ordering

Okumara, M., Mori W. and Yamaguchi, K. (1993) Theoritical studies of magnetic orderings in the P- and y-phases of p-NPNN and related nitroxides, Mol. Cryst. Liqu. Cryst., 232,35 14. 

This work shows the exceptional physics that can be done with a STM operated at cryogenic temperatures and the availability of STMs working down to liquid helium temperature opens broad avenues of research in the coming years. No doubt that among the many future scientific experiments accessible with low temperature STMs, the real-space electronic characterization of the metal-superconductor transition in /c-phases of BEDT-TTF salts, because Tc > 4 K, as well as the study of magnetic ordering in MOMs, will certainly occupy a relevant position. 

Neutrons also have spin and a magnetic moment that interacts with unpaired electrons in a sample allowing studies of magnetic order. Because the... 

We note here that ME effect can readily be used as a tool for investigation of fundamental physical properties of materials. Namely, since linear ME effect occurs in single-phase ferroics without time reversal only, it can be used complementarity to neutron scattering studies of magnetically ordered substances. 

We have seen in the preceding sections that studies of magnetic ordering in lanthanide materials by neutron diffraction, together with bulk magnetization and susceptibility measurements, as well as other types of measurements such as... 

Because the neutron has a magnetic moment, it has a similar interaction with the clouds of impaired d or f electrons in magnetic ions and this interaction is important in studies of magnetic materials. The magnetic analogue of the atomic scattering factor is also tabulated in the International Tables [3]. Neutrons also have direct interactions with atomic nuclei, whose mass is concentrated in a volume whose radius is of the order of... 

Due to the number of isotype compounds, systematic studies of physical properties of divalent metals phosphonates are of interest. For instance, systematic studies of magnetic properties could be carried out by varying the paramagnetic metal center [8, 12]. The organic part may also be varied systematically in order to determine the origin of a cooperative effect yielding... 

Ruthenium(III) fluoride can be prepared by the reduction of ruthenium(V) fluoride with either iodine or sulfur at elevated temperatures2312 or in an impure form by reduction of [RuF5]4 with ruthenium metal.2313 It is a dark brown powder shown by X-ray powder diffraction studies to consist of RuF6 corner shared octahedra, (with Ru—Ru separations of 3.37 A).2314 Neutron diffraction studies reveal no evidence of magnetic ordering even at 4.2 K.2315... 

There are variations of LEED that use positrons (low energy positron diffraction, or LEPD)/8/ or spin-polarized electrons as a probe./9/ The latter technique is especially useful as a probe of magnetic ordering in surfaces. Spin-polarized LEED, or SPLEED, has been used to study surface magnetism and phase transitions on nickel. 

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