Abstract：The crystal structures and magnetic properties of novel EuTrGa3?r (T=Pd, Ir, Rh) intermetallic compounds are investigated by using powder x-ray diffraction and magnetic measurements. EuTrGa3?r crystallizes in orthorhombic structure with space group of Cmcm and Z=4. There are four kinds of nonequivalent 4c crystal positions in EuTrGa3?r unit cell, which are occupied by 4Eu, 4GaI, 4(GaII, T) and 4GaIII, respectively. EuTrGa3?r exhibits the complex magnetic states in low-temperature regime, with the three-, two- and one-antiferromagnetic transitions occurring for T=Ir, T=Rh and T=Pd, respectively. It might be due to the Kondo effect: a localized antiferromagnetic interaction of the isolated impurity spins with the surrounding conduction electrons at low-temperature regime.
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2015, Vol. 32 
