Enhancement of magnetodielectric coupling in 6H-perovskites Ba3RRu2O9 for heavier rare earth cations (R=Ho,Tb)

Abstract

The role of rare-earth (R) ions on the magnetodielectric (MD) coupling is always intriguing and markedly different for different systems. Although many reports are available concerning this aspect in frustrated 3d-transition metal oxides, no such reports exist on higher d (4d/5d)-orbital based systems due to the rare availability of highly insulating 4d/5d-systems. Here, we systematically investigated the magnetic, dielectric, ferroelectric and magnetodielectric behavior of the 6H-perovskites Ba3RRu2O9 for different R-ions, namely, R= Sm, Tb and Ho, which magnetically order at 12, 9.5 and 10.2 K respectively. For R=Tb and Ho, the temperature and magnetic-field dependent complex dielectric constant traces the magnetic features, which manifests MD coupling in this system. A weak magnetic-field (H) induced transition is observed for ~30 kOe, which is clearly captured in H-dependent dielectric measurements. No MD coupling is observed for Ba3SmRu2O9. The MD coupling is enhanced by a factor of 3 and 20 times for R=Tb and Ho, respectively, when compared to that of the Nd-counterpart. These results evidence the gradual enhancement of MD coupling with the introduction of heavier R-ions in this series, which is attributed to their larger moment values. A weak improper ferroelectricity is documented for Ho-member, which is absent for Nd. Our investigation establishes dominating 4d(Ru)-4f(R) magnetic correlation in this series for the heavier R-members.

References in corpus (20)

• Spin-Orbit Physics Giving Rise to Novel Phases in Correlated Systems: Iridates and Related Materials
• Spin liquid behaviour in Jeff=1/2 triangular lattice Ba3IrTi2O9
• Magneto-electric effect in NdCrTiO5
• Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature
• High-temperature multiferroicity and strong magnetocrystalline anisotropy in 3d-5d double perovskites
• Magnetoelectric coupling in Haldane spin chain system, Dy2BaNiO5
• Magnetic Excitations in Spin-Orbit Coupled $d^4$ Mott Insulator on Square Lattice
• Colossal magnetoresistance in a Mott insulator via magnetic field-driven insulator-metal transition
• Extraordinarily large intrinsic magnetodielectric coupling of Tb member within the Haldane spin-chain family, R2BaNiO5
• Magnetoelectric Phase Diagrams of Multiferroic GdMn2O5
• Implications of magnetic and magnetodielectric behavior of GdCrTiO5
• Rare earth magnetism and ferroelectricity in RMnO3
• Multiferroicity and magneto-electric effect in Gd${}_2$BaNiO${}_5$
• Anisotropic temperature-field phase diagram of single-crystalline $\beta$-Li${}_2$IrO${}_3$: magnetization, specific heat, and ${}^7$Li NMR study
• Complex nature of magnetic field-induced ferroelectricity in GdCrTiO5
• Magnetodielectric coupling in a Ru-based 6H-perovskite, Ba3NdRu2O9
• Existence of a critical canting angle of magnetic moments to induce multiferroicity in the Haldane spin-chain system, Tb2BaNiO5
• 4f-hybridization effect on the magnetism of Nd2PdSi3, an anomalous magnetic compound
• Designing of a magnetodielectric system in hybrid organic-inorganic framework, a perovskite layered phosphonate MnO3PC6H4-m-Br.H2O
• The role of the rare earth in the lattice and magnetic coupling in multiferroic h-HoMnO3

Cited by in corpus (9)

• Cooperative Ru(4d)-Ho(4f) magnetic orderings and phase coexistence in the 6H-perovskite multiferroic Ba3HoRu2O9
• Magnetic ground state of the dimer-based hexagonal perovskite Ba${}_3$ZnRu${}_2$O${}_9$
• Origin of spin-driven ferroelectricity and effect of external pressure on the complex magnetism of 6H-perovskite Ba3HoRu2O9
• Complex magnetic structure in Ba5Ru3O12 with isolated Ru3O12-trimer
• Large magnetodielectric coupling in the vicinity of metamagnetic transition in $6H-$perovskite Ba${}_3$GdRu${}_2$O${}_9$
• Unconventional S-orbital state of Tb and cooperative Ru(4d)-Tb(4f) spin-ordering in strongly correlated 4d-4f system, Ba3TbRu2O9
• Interplay between trimer structure and magnetic ground state in Ba5Ru3O12 probed by Neutron and muSR techniques
• Intriguing Magnetocaloric Effect in Multiferroic Ba3RRu2O9 (R=Ho, Gd, Tb, Nd) with Strong 4d-4f Correlations
• Quasiparticle Dynamics in the 4d-4f Ising-like Double Perovskite Ba2DyRuO6 studied using Neutron Scattering and Machine-Learning Framework