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The Existence of a Gap Between the Para‐ and Ferromagnetic Phases in a Group of Pr Intermetallics Observed Through a Doublet‐Triplet Model
Author(s) -
Caldas A.,
Von Ranke P. J.,
Palermo L.
Publication year - 1993
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.2221750221
Subject(s) - intermetallic , ferromagnetism , excited state , ground state , symmetry (geometry) , space (punctuation) , condensed matter physics , crystal (programming language) , exchange interaction , group (periodic table) , series (stratigraphy) , physics , chemistry , materials science , mathematics , atomic physics , quantum mechanics , metallurgy , geometry , computer science , alloy , programming language , paleontology , biology , operating system
The present work constitutes a part of a continuing series of studies dealing with models, in which only the two lowest levels of the crystal field splitting scheme of the Pr 3+ ion in Pr intermetallics are retained. Taking into account the magnetic state equations derived from a model, in which the ground and first excited levels are doublet and triplet, respectively, the existence of a gap between the para‐ and ferromagnetic phases is shown in the space of J 0 (effective exchange parameter) versus Δ (crystal field parameter). This study is applied to the available experimental data of several Pr intermetallics, in cubic symmetry, and the results are in line with the previsions of the model.