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Collective Excitation Effects on the Electrical Resistivity of Singlet Ground State Paramagnets of Metallic Conduction
Author(s) -
Szukiel A. E.,
Markowski P. J.,
Durczewski K.
Publication year - 1988
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221470136
Subject(s) - formalism (music) , electrical resistivity and conductivity , paramagnetism , condensed matter physics , excitation , ground state , ferromagnetism , thermal conduction , singlet state , metal , materials science , physics , atomic physics , thermodynamics , excited state , quantum mechanics , metallurgy , art , musical , visual arts
The possibility of the occurrence of a maximum in the temperature dependence of the electrical resistivity in the paramagnetic phase of singlet ground state crystal field materials is examined theoretically on the basis of an earlier developed formalism for a many‐level system (PrIn 3 ) and a simple two‐level model. It is shown that the existence of a weak exchange interaction in paramagnetic PrIn 3 improves the fitting of the theoretical results to experimental data but the occurrence of the maximum in the temperature dependence of the resistivity in ferromagnetic Pr 3 Tl in an earlier paper by using the same formalism may be questioned. Further investigations are required to explain the effect.