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Author Sereni, J. G. ♦ Schlottmann, P.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ THORIUM ♦ KONDO EFFECT ♦ SUPERCONDUCTIVITY ♦ TERBIUM ADDITIONS ♦ SPECIFIC HEAT ♦ MAGNETIC SUSCEPTIBILITY ♦ MAGNETIZATION ♦ MAGNETORESISTANCE ♦ ELECTRONIC STRUCTURE ♦ TEMPERATURE DEPENDENCE
Abstract Dilute Tb{sub {ital x}}Th{sub 1{minus}{ital x}} alloys have been thoroughly studied in the light of a possible valence instability and Kondo effect in Tb{sup 3+} and Tb{sup 4+} ions. We review the experimental data for the specific heat, magnetic susceptibility, magnetization, magnetoresistivity, and the change of the superconducting properties of Th. In analogy to Tm (Tm{sup 2+} and Tm{sup 3+}) and Pr (Pr{sup 3+} and Pr{sup 4+}) impurities in metals, Tb involves two electronic configurations each with a magnetic Hund{close_quote}s rule ground multiplet. Two classes of models for valence admixtures of two magnetic configurations have been investigated in the past. Depending on the form of the hybridization and the {ital jj} coupling within the 4{ital f} shell, the models either have a singlet or a magnetic ground state. As for Tm impurities the latter class of models, related to the undercompensated Kondo effect, appears to describe the system Tb{ital Th} more appropriately. A qualitative explanation of the data is attempted within a scheme that combines Kondo screening with crystalline field splitting. {copyright} {ital 1996 American Institute of Physics.}
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 79
Issue Number 8
Technical Publication No. CONF-951101-


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