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We report sample preparation, structure, electrical resistivity, magneticsusceptibility and heat capacity studies of a new compound Yb$_2$Ir$_3$Ge$_5$.We find that this compound crystallizes in an orthorhombic structure with aspace group PMMN unlike the compound Ce$_2$Ir$_3$Ge$_5$ which crystallizes inthe tetragonal IBAM (U$_2$Co$_3$Si$_5$ type) structure. Our resistivitymeasurements indicate that the compound Yb$_2$Ir$_3$Ge$_5$ behaves like atypical Kondo lattice system with no ordering down to 0.4 K. However, aCurie-Weiss fit of the inverse magnetic susceptibility above 100 K gives aneffective moment of only 3.66 $\mu$$_B$ which is considerably less than thetheoretical value of 4.54 $\mu$$_B$ for magnetic Yb$^3+$ ions. The value of$\theta_{P}$ = -15.19 K is also considerably higher indicating the presence ofstrong hybridization. An upturn in the low temperature heat capacity gives anindication that the system may order magnetically just below the lowesttemperature of our heat capacity measurements (0.4 K). The structure containstwo sites for Yb ions and the present investigation suggests that Yb may betrivalent in one site while it may be significantly lower (close to divalent)in the other.Comment: 9 pages, 4 figures. submitted to Phys. Rev.

physical review. b, condensed matter

Physical properties of the Kondo-lattice compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Yb</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ir</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ge</mml:mi></mml:mrow><mml:mrow><…

Physical properties of the Kondo-lattice compoundYb2Ir3Ge<…