Tipping the magnetic instability in paramagnetic Sr${}_3$Ru${}_2$O${}_7$ by Fe impurities

Abstract

We report the magnetic and electronic properties of the bilayer ruthenate Sr${}_3$Ru${}_2$O${}_7$ upon Fe substitution for Ru. We find that Sr${}_3$(Ru${}_{1-x}$Fe${}_x$)${}_2$O${}_7$ shows a spin-glass-like phase below 4 K for $x$ = 0.01 and commensurate E-type antiferromagnetically ordered insulating ground state characterized by the propagation vector $q_c$ = (0.25 0.25 0) for $x$ $\ge$ 0.03, respectively, in contrast to the paramagnetic metallic state in the parent compound with strong spin fluctuations occurring at wave vectors $q$ = (0.09 0 0) and (0.25 0 0). The observed antiferromagnetic ordering is quasi-two-dimensional with very short correlation length along the $c$ axis, a feature similar to the Mn-doped Sr${}_3$Ru${}_2$O${}_7$. Our results suggest that this ordered ground state is associated with the intrinsic magnetic instability in the pristine compound, which can be readily tipped by the local magnetic coupling between the 3$d$ orbitals of the magnetic dopants and Ru 4$d$ orbitals.

19 pages, 4 figures

References in corpus (19)

• Complexity in Strongly Correlated Electronic Systems
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• Evaluation of Spin-Triplet Superconductivity in Sr2RuO4
• Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
• Evidence for incommensurate spin fluctuations in Sr_2RuO_4
• The ground state of Sr3Ru2O7 revisited; Fermi liquid close to a ferromagnetic instability
• Magnetic Phase Diagram of Ca2-xSrxRuO4 Governed by Structural Distortions
• Field tunable spin density wave phases in Sr3Ru2O7
• Incommensurate magnetic ordering in Sr_2Ru_(1-x)Ti_xO_4
• Spin-valve effect and magnetoresistivity in single crystalline Ca3Ru2O7
• Magnetic ordering in Sr2RuO4 induced by nonmagnetic impurities
• Metamagnetic Quantum Criticality Revealed by 17O-NMR in the Itinerant Metamagnet Sr3Ru2O7
• Impurity-induced transition to a Mott insulator in Sr${}_3$Ru${}_2$O${}_7$
• Spin-Orbital Order Modified by Orbital Dilution in Transition Metal Oxides: From Spin Defects to Frustrated Spins Polarizing Host Orbitals
• Crystal-field level inversion in lightly Mn-doped Sr3Ru2O7
• Evolution of Structural and Physical Properties of Sr3(Ru1-xMnx)2O7 with Mn Concentration
• Mott versus Slater-type metal-insulator transition in Mn-substituted Sr3Ru2O7
• Competing magnetic fluctuations in Sr3Ru2O7 probed by Ti doping
• Non-Fermi surface nesting driven commensurate magnetic ordering in Fe-doped Sr${}_2$RuO${}_4$

Cited by in corpus (2)

• Competing magnetic orders in quantum critical Sr${}_3$Ru${}_2$O${}_7$
• Atomic-scale imaging of emergent order at a magnetic-field-induced Lifshitz transition