Abstract
Electrical transport properties of the R3Ag4Sn4 (R = Gd, Tb, Dy, Ho) intermetallics crystallized in the orthorhombic Gd3Cu4Ge4 structure type (space group Immm) were studied in the temperature interval 11 – 300 K. Measurements of the temperature dependencies of electrical resistivity (r(T)) showed that all the studied compounds are characterized by metallic type of conductivity. The slope change of the resistivity at low temperature part of r(T) dependencies for Gd3Ag4Sn4, Tb3Ag4Sn4 and Dy3Ag4Sn4 compounds is connected with their magnetic ordering. Change of the resistivity caused by magnetic ordering was not observed for the Ho3Ag4Sn4 compound in the studied temperature interval. Relation between magnetic and electric properties of the investigated R3Ag4Sn4 compounds was analyzed.
Highlights
One of the several well-known series of the compounds formed in the R–M–Sn (R – rare earth metal, M – d-еlement) ternary systems, is the series of the R3M4Sn4 intermetallics which crystallize in the Gd3Cu4Ge4 structure type [1,2,3,4,5]
Magnetic property studies of the R3M4Sn4 compounds showed that intermetallics with magnetic rare earth elements are characterized by antiferromagnetic ordering at low temperatures, and the magnetic moments are localized on the atoms of the rare earths [5,6,7,8,9,10]
In this work we present the results of the electrical property investigation of the R3Ag4Sn4 (R = Gd, Tb, Dy, Ho) stannides in the temperature interval 11 – 300 К and an analysis of the relation between their magnetic and electric properties
Summary
One of the several well-known series of the compounds formed in the R–M–Sn (R – rare earth metal, M – d-еlement) ternary systems, is the series of the R3M4Sn4 intermetallics which crystallize in the Gd3Cu4Ge4 structure type (space group Immm) [1,2,3,4,5]. Magnetic property studies of the R3M4Sn4 compounds showed that intermetallics with magnetic rare earth elements are characterized by antiferromagnetic ordering at low temperatures, and the magnetic moments are localized on the atoms of the rare earths [5,6,7,8,9,10]. It is well known that the peculiarity of the magnetic state of the intermetallic compounds with rare earths of Yttrium group is displayed on their electrical property behavior. It is caused by the change of the scattering mechanisms depending on the magnetic component in the compound, nature and orientation of the magnetic moments, etc.
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