DC pole | Wartość | Język |
dc.contributor.author | Pietruszka, Mariusz | - |
dc.contributor.author | Matlak, Michał | - |
dc.date.accessioned | 2019-03-12T09:50:27Z | - |
dc.date.available | 2019-03-12T09:50:27Z | - |
dc.date.issued | 1999 | - |
dc.identifier.citation | Acta Physica Polonica. A, Vol. 96, nr 6 (1999), s. 725-732 | pl_PL |
dc.identifier.issn | 0587-4246 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/8483 | - |
dc.description.abstract | We study antiferromagnetic properties of the two-band extended s— f
model with fluctuating valence in the context of two mutually bound new
effects of chemical potential critical behaviour, as well as of critical electron
redistribution. In order to exemplify both phenomena we build phase diagrams
of the system displaying the dependence of the critical Neel temperatures
(TN) of the system versus 4f (5f) level positions. The phase diagram
consists of two different areas corresponding to antiferromagnetic and paramagnetic
phases. We plot the magnetizations and the correlation functions
of the system as functions of temperature. Next, we investigate the temperature
dependence of the relative average occupation numbers Δn f( d) and
the chemical potential ΔA for a given 4f (5f)" level position Ef. Plotting
this quantities along the Ef cross-section lines we observe small (of the order
of 10 -4 -10 -3 ) but well localized kinks exactly at the Neel temperature
TN. Last but not least, we plot the first derivative of the chemical potential
,wdT mhiacμyh t uars/n iN tod suht otTwo sb eclearly visible jumps at
very accurate and sensitive (auxiliary) tool to find critical temperatures of
the considered system. Moreover, we plot the difference μAF — μPARA where
we subtract a chemical potential value of a reference paramagnetic sample
from the actual value of the antiferromagnetic system. Also in this case we
report the observation of discontinuous change in slope at TN. Our observations
can be extended to point out to a new practical possibility of how to
find experimentally the critical temperatures of the antiferromagnetic systems
exclusively from the chemical potential measurements. We expect that
the same type of measurement, according to our recent and present results,
would also apply to all types of critical phenomena in real solids. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/pl/ | * |
dc.subject | lead | pl_PL |
dc.subject | lead germanate | pl_PL |
dc.subject | paramagnetic resonance | pl_PL |
dc.title | Chemical potential derivative as hallmark for phase transitions | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.relation.journal | Acta Physica Polonica. A | pl_PL |
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