Antiferromagnetism in EuNiGe3

Abstract

The synthesis and crystallographic and physical properties of polycrystalline EuNiGe3 are reported. EuNiGe3 crystallizes in the noncentrosymmetric body-centered tetragonal BaNiSn3-type structure. The physical property data consistently demonstrate that this is a metallic system in which Eu spins S = 7/2 order antiferromagnetically at a temperature TN = 13.6 K. Magnetic susceptibility chi data for T > TN indicate that the Eu atoms have spin 7/2 with g = 2, that the Ni atoms are nonmagnetic, and that the dominant interactions between the Eu spins are ferromagnetic. Thus we propose that EuNiGe3 has a collinear A-type antiferromagnetic structure. A fit of chi(T < TN) by our molecular field theory is consistent with a collinear magnetic structure. Electrical resistivity rho data from TN to 350 K are fitted by the Bloch-Gruneisen model for electron-phonon scattering, yielding a Debye temperature of 265(2) K. A strong decrease in rho occurs below TN due to loss of spin-disorder scattering. Heat capacity data at 25 K < T < 300 K are fitted by the Debye model, yielding the same Debye temperature 268(2) K as found from rho(T). The extracted magnetic heat capacity is consistent with S = 7/2. The magnetic entropy at TN = 13.6 K is 83% of the expected asymptotic high-T value, with the remainder recovered by 30 K.

10 pages, 7 figures; submitted to Phys. Rev. B

References in corpus (4)

• Structural, Thermal, Magnetic and Electronic Transport Properties of the LaNi2(Ge{1-x}P{x})2 System
• Magnetic Susceptibility of Collinear and Noncollinear Heisenberg Antiferromagnets
• Two successive field-induced spin-flop transitions in single-crystalline CaCo${}_2$As${}_2$
• Metamagnetic transition in Ca${}_{1-x}$Sr${}_x$Co${}_2$As${}_2$($x$ = 0 and 0.1) single crystals

Cited by in corpus (17)

• Itinerant and local-moment magnetism in EuCr2As2 single crystals
• Stabilization mechanisms of magnetic skyrmion crystal and multiple-$Q$ states based on momentum-resolved spin interactions
• Exploring metamagnetism of single crystalline \eun\ by neutron scattering
• Distorted triangular skyrmion lattice in a noncentrosymmetric tetragonal magnet
• Thermodynamic and transport properties of single crystalline RCo${}_2$Ge${}_2$ (R = Y, La-Nd, Sm-Tm)
• Magnetic properties and complex magnetic phase diagram in non centrosymmetric EuRhGe${}_3$ and EuIrGe${}_3$ single crystals
• Bulk electronic structure of non-centrosymmetric EuTGe3 (T= Co, Ni, Rh, Ir) studied by hard x-ray photoelectron spectroscopy
• Cycloidal Magnetic Ordering in Noncentrosymmetric EuIrGe${}_3$
• Magnetic properties of the noncentrosymmetric tetragonal antiferromagnet EuPtSi${}_3$
• Complex magnetic phases in polar tetragonal intermetallic NdCoGe${}_3$
• Evidence of The Anomalous Fluctuating Magnetic State by Pressure Driven 4f Valence Change in EuNiGe${}_3$
• Enhanced conduction band density of states in intermetallic EuTSi${}_3$ (T=Rh, Ir)
• Evidences for magnetic dimers and skyrmion lattice formation in Eu${}_2$Pd${}_2$Sn
• Molecular-field-theory fits to magnetic susceptibilities of antiferromagnetic GdCu2Si2, CuO, LiCrO2, and alpha-CaCr2O4 single crystals below their Neel temperatures
• Instability and evolution of the magnetic ground state in metallic perovskites GdRh${}_3$C${}_{1-x}$B${}_x$
• Double-$Q$ and quadruple-$Q$ instabilities at low-symmetric ordering wave vectors under tetragonal symmetry
• Field-tunable quadruple-$Q$ states driven by momentum-space frustration