Specific heat of a Coqblin-Schrieffer model with crystal fields: New crossover features and scaling properties

1985 ◽  
Vol 32 (9) ◽  
pp. 6100-6103 ◽  
Author(s):  
H.-U. Desgranges ◽  
J. W. Rasul
Keyword(s):  
Specific Heat ◽  
Scaling Properties ◽  
Crystal Fields

The magnetic properties of praseodymium metal

1963 ◽  
Vol 276 (1364) ◽  
pp. 39-50 ◽  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Simple Model ◽  
Specific Heat ◽  
Field Model ◽  
Hexagonal Symmetry ◽  
Crystal Fields ◽  
Magnetic Specific Heat ◽  
Crystal Field Parameters ◽  
Two Parameter

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.

scholarly journals Scaling properties of the magnetic-field-induced specific heat of superconductingUBe13

2001 ◽  
Vol 63 (10) ◽  
Author(s):  
Ch. Wälti ◽  
E. Felder ◽  
H. R. Ott ◽  
Z. Fisk ◽  
J. L. Smith
Keyword(s):  
Magnetic Field ◽  
Specific Heat ◽  
Scaling Properties ◽  
The Magnetic Field

Integrated Fractional white Noise as an Alternative to Multifractional Brownian Motion

2007 ◽  
Vol 44 (02) ◽  
pp. 393-408 ◽  
Author(s):  
Allan Sly
Keyword(s):  
Stochastic Process ◽  
Brownian Motion ◽  
White Noise ◽  
Gaussian Process ◽  
Discrete Data ◽  
Hölder Exponent ◽  
Scaling Properties ◽  
Multifractional Brownian Motion ◽  
Local Properties

Multifractional Brownian motion is a Gaussian process which has changing scaling properties generated by varying the local Hölder exponent. We show that multifractional Brownian motion is very sensitive to changes in the selected Hölder exponent and has extreme changes in magnitude. We suggest an alternative stochastic process, called integrated fractional white noise, which retains the important local properties but avoids the undesirable oscillations in magnitude. We also show how the Hölder exponent can be estimated locally from discrete data in this model.

200kv superconducting cryo electron microscope

1987 ◽  
Vol 45 ◽  
pp. 642-643
Author(s):  
M. Iwatsuki ◽  
Y. Kokubo ◽  
Y. Harada ◽  
J. Lehman
Keyword(s):  
Electron Microscope ◽  
Structure Analysis ◽  
Organic Materials ◽  
Strong Interactions ◽  
Specimen Preparation ◽  
Great Effort ◽  
Electron Microscopic ◽  
Crystal Fields ◽  
Special Skill ◽  
Long Time

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.

The Specific Heat of Steam

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