Frustration, strain and phase co-existence in the mixed valent hexagonal iridate Ba${}_3$NaIr${}_2$O${}_9$

Abstract

Using detailed synchrotron diffraction, magnetization, thermodynamic and transport measurements, we investigate the relationship between the mixed valence of Ir, lattice strain and the resultant structural and magnetic ground states in the geometrically frustrated triple perovskite iridate Ba${}_3$NaIr${}_2$O${}_9$. We observe a complex interplay between lattice strain and structural phase co-existence, which is in sharp contrast to what is typically observed in this family of compounds. The low temperature magnetic ground state is characterized by the absence of long range order, and points towards the condensation of a cluster glass state from an extended regime of short range magnetic correlations.

References in corpus (12)

• Correlated quantum phenomena in the strong spin-orbit regime
• Spin-Orbit Physics Giving Rise to Novel Phases in Correlated Systems: Iridates and Related Materials
• Slaving of the magnetic moment canting to the correlated oxygen rotation in Sr2IrO4 revealed by X-ray resonant scattering
• Spin-orbital liquid state assisted by singlet-triplet excitation in $J=0$ ground state of Ba${}_3$ZnIr${}_2$O${}_9$
• B-site spin-state and anti-site disorder driven multiple-magnetic phases: Griffiths phase, re-entrant cluster glass and exchange bias in double perovskite Pr${}_2$CoFeO${}_6$
• Charge order at the frontier between the molecular and solid states in Ba3NaRu2O9
• Excess specific heat and evidence of zero point entropy in magnetic glassy state of half-doped manganites
• Evolution of the structural, magnetic and electronic properties of the triple perovskite Ba${}_3$CoIr${}_2$O${}_9$
• From Cooperative Paramagnet to Néel Order in Y_2Ru_2O_7
• Spin-orbit coupling driven insulating state in hexagonal iridates Sr3MIrO6 (M = Sr, Na and Li)
• Coexisting Magnetic Order and Cooperative Paramagnetism in the Stuffed Pyrochlore Tb_{2+x}Ti_{2-2x}Nb_xO_7
• Emergence of Griffiths phase, re-entrant cluster glass,metamagnetic transition and field induced unusual spin dynamics in Tb2CoMnO6

Cited by in corpus (1)

• Disorder driven cluster glass state in a geometrically frustrated hexagonal perovskite