Magnetic order in Pr2Pd3Ge5 and possible heavy fermion behavior in Pr2Rh3Ge5

Abstract

We report our results on two new ternary intermetallic compounds Pr${}_2$Pd${}_3$Ge${}_5$ and Pr${}_2$Rh${}_3$Ge${}_5$ based on magnetic susceptibility, magnetization, specific heat, resistivity and magnetoresistance data. These compounds form in U${}_2$Co${}_3$Si${}_5$-type orthorhombic structure (space group \textit{Ibam}). Pr${}_2$Pd${}_3$Ge${}_5$ exhibits two magnetic transitions at T${}_{N1}$ = 7.5 K and T${}_{N2}$ = 8.3 K. In the magnetically ordered state Pr${}_2$Pd${}_3$Ge${}_5$ exhibits a field induced metamagnetic transition and unusually large magnetoresistance. Pr${}_2$Rh${}_3$Ge${}_5$ does not show any phase transition down to 0.5 K. It has a CEF singlet ground state, separated from the first excited state by about 10 K. The low lying crystal field excitations lead to exciton mediated electronic mass enhancement as evidenced by large Sommerfeld coefficient ($\gamma$ $\sim$ 80 mJ/mol K${}^2$) in Pr${}_2$Rh${}_3$Ge${}_5$.

arXiv comment14 pages, 7 figures

References in corpus (5)

• Time-Reversal Symmetry-Breaking Superconductivity in Heavy Fermion PrOs4Sb12 detected by Muon Spin Relaxation
• Multiple Superconducting Phases in New Heavy Fermion Superconductor PrOs4Sb12
• The Crystal Field Potential of PrOs4Sb12: Consequences for Superconductivity
• Direct Observation of Quadrupolar Excitons in the Heavy-Fermion Superconductor PrOs${}_4$Sb${}_{12}$
• Field-induced suppression of the heavy-fermion state in YbRh_2Si_2

Cited by in corpus (5)

• Valence fluctuation in Ce${}_2$Co${}_3$Ge${}_5$ and crystal field effect in Pr${}_2$Co${}_3$Ge${}_5$
• Heavy fermion behavior in PrRh2B2C: Excitonic mass enhancement
• Magnetic and transport properties of Pr2Pt3Si5
• Magnetic properties of ferromagnetic Pu2Pt3Si5
• Room temperature charge density wave in a tetragonal polymorph of Gd2Os3Si5 and study of its origin in the RE2T3X5 (RE = Rare earth, T = transition metal, X = Si, Ge) series