Magnetic properties of the ternary rare earth silicides R2PdSi3 (R = Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm and Y)

Electronic Structure and Nesting-Driven Enhancement of the RKKY Interaction at the Magnetic Ordering Propagation Vector inGd2PdSi3andTb2PdSi3Inosov1, Evtushinsky2, Koitzsch3 et al. 2009Phys. Rev. Lett.483230View full textAdd to dashboardCite

“…Comparison with neutron diffraction data from the same crystals shows perfect agreement of this vector with the propagation vector of the low-temperature in-plane magnetic order, thereby demonstrating the decisive role of the Fermi surface geometry in explaining the complex magnetically ordered ground state of ternary rare earth silicides. Ternary rare earth silicides with hexagonal crystal structure of the form R 2 PdSi 3 , where R is a rare earth atom, are known to exhibit complex magnetic behavior [1,2,3,4,5,6,7,8,9,10,11,12,13,14] Most of the R 2 PdSi 3 compounds order magnetically at low temperatures, somewhat below the Kondo minimum in the resistivity [2,3,4,5,6]. The exact type of such ordering strongly depends on the material and can be rather complicated [6,10].…”

“…Comparison with neutron diffraction data from the same crystals shows perfect agreement of this vector with the propagation vector of the low-temperature in-plane magnetic order, thereby demonstrating the decisive role of the Fermi surface geometry in explaining the complex magnetically ordered ground state of ternary rare earth silicides. Ternary rare earth silicides with hexagonal crystal structure of the form R 2 PdSi 3 , where R is a rare earth atom, are known to exhibit complex magnetic behavior [1,2,3,4,5,6,7,8,9,10,11,12,13,14] due to a delicate competition of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction [15] and the Kondo effect, which are comparable in magnitude [1,2]. Such interplay determines many unusual magnetic, thermal, and transport properties, which stimulate unceasing interest to these materials during the last two decades: large negative magnetoresistance [3], quasi-lowdimensional magnetism and spin-glass-like behavior [7,8], highly anisotropic ac susceptibility [7], magnetocaloric effect [9], thermoelectric power [1], and Hall coefficient [1].…”

Magnetic Behaviour and Electronic Structure of the R2PdSi3(R = Ce, Nd, Tb-Er) Compounds

“…X-ray diffraction data [2] indicate that these compounds with R = Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, and Y crystallize in ΑlΒ 2-derived hexagonal structure. Pr2PdSi3 does not show any magnetic ordering temperature down to 4.2 K. Nd 2 PdSi3 is ferromagnetic with a Curie temperature of 16 K. The heavy rare-earth compounds (R = Gd-Er) show magnetic ordering temperatures in the region between 8 and (823) 21 K [2]. New magnetic data [3][4][5][6] reveal small anomaly in the temperature dependence of the magnetic susceptibility of Ce2PdSi3 near 7 K [3], two ordering temperatures at 40 and 10 K for Eu 2 PdSi3 [4], one at 21 K for Gd 2 PdSi3 [5], 23 for Tb2PdSi3 and 8 K for Dy 2 PdSi3 [6].…”

“…Recently, we have been paying special attention to the R2PdSi3 [2]. X-ray diffraction data [2] indicate that these compounds with R = Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, and Y crystallize in ΑlΒ 2-derived hexagonal structure.…”

“…Recently, we have been paying special attention to the R2PdSi3 [2]. X-ray diffraction data [2] indicate that these compounds with R = Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, and Y crystallize in ΑlΒ 2-derived hexagonal structure. Pr2PdSi3 does not show any magnetic ordering temperature down to 4.2 K. Nd 2 PdSi3 is ferromagnetic with a Curie temperature of 16 K. The heavy rare-earth compounds (R = Gd-Er) show magnetic ordering temperatures in the region between 8 and (823) 21 K [2].…”