Boron magnetic susceptibility

Intense research has in recent years been devoted to noncrystalline materials. It was discovered also that the majority of semiconducting boron-rich borides display several properties that resemble those of the noncrystalline solids. Among the amorphous properties are the temperature and field dependencies of electrical conductivity at low temperature, the temperature dependence of thermal conductivity at high temperatures, and the temperature dependence of the magnetic susceptibility. In addition, the boron-rich semiconductors display crystalline properties, for example, the temperature dependence of the thermal condnctivity at low temperatures, the lattice absorption spectra and the possibility to change... 

Forbidden Band Width and Magnetic Susceptibility of Boron Phosphide.. 155... 

FORBIDDEN BAND WIDTH AND MAGNETIC SUSCEPTIBILITY OF BORON PHOSPHIDE ... 

Table 3 lists the values of the specific and the molar magnetic susceptibilities at temperatures from 184 to 470°K. The results obtained indicated that the absolute susceptibility of our samples of boron phosphide increased weakly and practically linearly with risii temperature (in the range considered). 

From chemical, gravimetric and X-ray structural analysis a complete solid solution Lai jSm B5 was found, usually deviating from stoichiometry towards boron defects. Comparison of pycnometric (measured in toluene) and X-ray densities revealed the existence of metal vacancies. Due to the change in the proportion of the Sm " " and Sm + ions the magnetic susceptibility depends nonlinearly on the La concentration (30% Sm + in SmB to 50% Sm + for 80% LaB ). 

We determined also Ihe temperature dependence of the m netic susceptibiliiy of boron phosphide. The diamagnetic susceptibility was measured by the Gouy method in quartz ampoules in a magnetic field of 6500 Oe. Preliminary measurements demonstrated that this m -netic field was sufficient to suppress completely the influence of possible ferromz etic impurities. The measurement method was similar to that described in [9]. 

The magnetic properties of amorphous thin films of GdFeB have been investigated by Taylor and Gangulee (1982) (magnetization as a function of temperature and the high field volume susceptibility as a function of the boron concentration). 

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