Anisotropy tuned magnetic order in pyrochlore iridates

Abstract

The magnetic behavior of polycrystalline samples of Er${}_2$Ir${}_2$O${}_7$ and Tb${}_2$Ir${}_2$O${}_7$ pyrochlores is studied by magnetization measurements and neutron diffraction. Both compounds undergo a magnetic transition at 140 and 130 K respectively, associated with an ordering of the Ir sublattice, signaled by thermomagnetic hysteresis. In Tb${}_2$Ir${}_2$O${}_7$, we show that the Ir molecular field leads the Tb magnetic moments to order below 40 K in the all-in/all-out magnetic arrangement. No sign of magnetic long range order on the Er sublattice is evidenced in Er${}_2$Ir${}_2$O${}_7$ down to 0.6 K where a spin freezing is detected. These contrasting behaviors result from the competition between the Ir molecular field and the different single-ion anisotropy of the rare-earths on which it is acting. Additionally, this strongly supports the all-in/all-out iridium magnetic order.

References in corpus (6)

• Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
• Tetrahedral Magnetic Order and the Metal-Insulator Transition in the Pyrochlore Lattice of Cd2Os2O7
• Magnetic Order in the Pyrochlore Iridates A2Ir2O7 (A = Y, Yb)
• Enhanced weak ferromagnetism and conductivity in hole-doped pyrochlore iridate Y2Ir2O7
• Direct Evidence for the 'All-in/All-out' Magnetic Structure in the Pyrochlore Iridates from $\mu$SR
• All-in/all-out magnetic domains: X-ray diffraction imaging and magnetic field control

Cited by in corpus (28)

• Fluctuations and all-in$-$all-out ordering in dipole-octupole Nd2Zr2O7
• All-in all-out magnetic order and propagating spin-waves in Sm2Ir2O7
• The study of magnetic topological semimetals by first principles calculations
• Emergent excitation at the magnetic metal-insulator transition in the pyrochlore osmate Cd2Os2O7
• Coulomb Correlations in 4d and 5d Oxides from First Principles - or How Spin-Orbit Materials choose their Effective Orbital Degeneracies
• Direct determination of the spin structure of Nd${}_2$Ir${}_2$O${}_7$ by means of neutron diffraction
• Competing orders and topology in the global phase diagram of pyrochlore iridates
• Fragmentation in Frustrated Magnets -- A review
• Rational design principles for giant spin Hall effect in 5d-transition metal oxides
• Dilute stuffing in the pyrochlore iridate $E{u}_{2}I{r}_2{O}_7$
• Fragmented monopole crystal, dimer entropy and Coulomb interactions in Dy${}_2$Ir${}_2$O${}_7$
• Robust pinning of magnetic moments in pyrochlore iridates
• Possible quantum paramagnetism in compressed Sr${}_2$IrO${}_4$
• Heavy-mass magnetic modes in pyrochlore iridates due to dominant Dzyaloshinskii-Moriya interaction
• Anomalous lattice contraction and emergent electronic phases in Bi-doped Eu${}_2$Ir${}_2$O${}_7$
• Classical and quantum phases of the pyrochlore $S=1/2$ magnet with Heisenberg and Dzyaloshinskii-Moriya interactions
• Monopole holes in a partially ordered spin liquid
• Gd pyrochlore under a staggered molecular field in Gd${}_2$Ir${}_2$O${}_7$
• Approaching the quantum critical point in a highly-correlated all-in-all-out antiferromagnet
• The multiple symmetry sustaining phase transitions of spin ice
• The interplay between structural, magnetic and electronic states in the pyrochlore iridate Eu2Ir2O7
• Strong quantum fluctuations due to competition between magnetic phases in a pyrochlore iridate
• Selective probing of magnetic order on Tb and Ir sites in stuffed Tb${}_{2+x}$Ir${}_{2-x}$O${}_{7-y}$ using resonant X-ray scattering
• Vison crystal in quantum spin ice on the breathing pyrochlore lattice
• Electron quasi-itinerancy intertwined with quantum order by disorder in pyrochlore iridate magnetism
• Magnetic charge injection in spin ice: a new way to fragmentation
• Bragg diffraction by a magnetic all-in-all-out configuration with application to a cubic cerium pyrochlore oxide
• Ferromagnetic fragmented state in the pyrochlore Ho${}_2$Ru${}_2$O${}_7$