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The Influence of Antiferromagnetic Order on the Evaluation of Spin Disorder Resistivity
Author(s) -
Gratz E.,
Poldy C. A.
Publication year - 1977
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.2220820116
Subject(s) - antiferromagnetism , condensed matter physics , ferromagnetism , electrical resistivity and conductivity , paramagnetism , spins , curie temperature , electron , spin (aerodynamics) , thermal conduction , curie , atmospheric temperature range , chemistry , materials science , physics , thermodynamics , quantum mechanics
It is known that the parameters ϱ spd (spin disorder rosistivity) and θ p can be used for estimating the effective mass m* of the conduction electrons and exchange constant G. ϱ spd is the temperature independent contribution to the electrical resistivity in the paramagnetic temperature range whereby this contribution is due to the disordered localized spins, and θ p is the paramagnetic Curie temperature. The above procedure is appeared in the literature for the rare earth melalv (R) and their interinetallic compounds not only for ferromagnetic (Ral 2 ) but also for antiferromagnetic (Rau 2 , Rag 2 , Rcu 2 ) systems. It is tested whether such a procedure for estimating m * and G is valid irrespective of whether the ordering is ferromagnetic or antifcrromagnctic. This investigation is carried out for the system Gd(Ni, CU) 2 and it is shown that the above procedure is principally inapplicable for θ spd i values obtained from antiferromagnctic samples. In addition a discussion is given of the validity of the free electron approximation in the Gd(Ni, Cu) 2 and the GdZn 2 systems, whereby it is concluded that the s‐character deteriorates with increasing electron concentration.