Anomalies of transport properties in antiferromagnetic compound

Abstract

The low-temperature transport properties (resistivity, thermal conductivity, thermoelectric power) are experimentally investigated for the compound YbMn 2 Sb 2 . Large Seebeck coefficient and nearly linear temperature dependence of resistivity are obtained. The thermal conductivity is large and has mainly phonon origin. Appreciable anomalies of transport characteristics near the antiferromagnetic transition point are found. Possible influence of pseudo-Kondo scattering is discussed.

Generic Seebeck effect from spin entropy

“…The vertical arrows mark the positions of T C or T N (for WFM compounds, the position of the maximum in magnetic susceptibility). 20 Morozkin et al 21 Among these, Co 2 TiSn and CaFe 4 Sb 12 are representatives of a large group of magnetic Heusler and filled skutterudite compounds, respectively, with similar a(T) profiles, see Balke et al 12 and Takabatake et al 18 a While a clear indication of ferromagnetic ordering is absent, CaFe 4 Sb 12 shows a shoulder at T z 50 K in magnetic susceptibility due to incipient ferromagnetism. 19 b In YbMn 2 Sb 2 , magnetic moment originates from Mn d bands and divalent Yb ion is nonmagnetic.…”

On the Ytterbium Valence and the Physical Properties in Selected Intermetallic Phases

“…Finally, it has been proven that Mg can substitute on both the Yb and Zn sites . Besides YbZn 2 Sb 2 , also YbMg 2 Sb 2 , YbMg 2 Bi 2 , − YbMn 2 Sb 2 , YbCd 2 Sb 2 , and the solid solutions YbCd 2– x Mn x Sb 2 have been investigated in great detail.…”

Electronic properties of the ternary system YbPd$_2 $Ge$_{2-x}$

“…It is interesting that this feature of resistivity is observed in the system YbMn 2 Sb 2 with nonmagnetic ytterbium, where normal Kondo effect should be absent. These anomalies may be associated with scattering on pseudospin degrees of freedom [2].…”