Specific heat of the degenerate Kondo model: Exact results in the presence of crystal fields

1987 ◽  
Vol 36 (1) ◽  
pp. 328-340 ◽  
Author(s):  
H.-U. Desgranges ◽  
J. W. Rasul

The magnetic properties of praseodymium metal are interpreted in term s of a simple model suggested by the crystal structure where alternate layers of ions are subjected to crystal fields of face-centred cubic and hexagonal symmetry. The crystal field parameters are found by fitting the magnetic specific heat anomaly, and the variation of the susceptibility with temperature can be explained using a two-parameter molecular field model. The exchange intemaction is predominantly ferromagnetic in sign. The origin of the hyperfine specific heat is discussed, and attributed to interaction effects, though these must be larger than can be accounted for by simple theoretical estimates.


1987 ◽  
Vol 9 (5) ◽  
pp. 481-488 ◽  
Author(s):  
J. D. Mancini ◽  
C. D. Potter

1981 ◽  
Vol 47 (21) ◽  
pp. 1553-1556 ◽  
Author(s):  
Luiz N. Oliveira ◽  
John W. Wilkins
Keyword(s):  

1982 ◽  
Vol 91 (5) ◽  
pp. 240-242 ◽  
Author(s):  
H.-U. Desgranges ◽  
K.D. Schotte
Keyword(s):  

1982 ◽  
Vol 53 (11) ◽  
pp. 7933-7935
Author(s):  
N. Andrei ◽  
V. T. Rajan

Author(s):  
M. Iwatsuki ◽  
Y. Kokubo ◽  
Y. Harada ◽  
J. Lehman

In recent years, the electron microscope has been significantly improved in resolution and we can obtain routinely atomic-level high resolution images without any special skill. With this improvement, the structure analysis of organic materials has become one of the interesting targets in the biological and polymer crystal fields.Up to now, X-ray structure analysis has been mainly used for such materials. With this method, however, great effort and a long time are required for specimen preparation because of the need for larger crystals. This method can analyze average crystal structure but is insufficient for interpreting it on the atomic or molecular level. The electron microscopic method for organic materials has not only the advantage of specimen preparation but also the capability of providing various information from extremely small specimen regions, using strong interactions between electrons and the substance. On the other hand, however, this strong interaction has a big disadvantage in high radiation damage.


1882 ◽  
Vol 14 (342supp) ◽  
pp. 5451-5452
Author(s):  
J. MacFarlane Gray
Keyword(s):  

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