Evolution of competing magnetic order in the Jeff=1/2 insulating state of Sr2Ir1-xRuxO4

Calder, Stuart A.; Kim, Jong-Woo; Cao, Guixin; Cantoni, Claudia; May, Andrew F; Cao, Huibo B.; Aczel, Adam A.; Matsuda, Masaaki; Choi, Yongseong; Haskel, Daniel; Sales, B. C.; Mandrus, David; Lumsden, Mark D.; Christianson, Andrew D.

doi:10.1103/PhysRevB.92.165128

Title: Evolution of competing magnetic order in the J_eff=1/2 insulating state of Sr₂Ir_1-xRu_xO₄

Journal Article · Tue Oct 27 00:00:00 EDT 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.165128· OSTI ID:1237619

Calder, Stuart A. ^[1]; Kim, Jong-Woo ^[2]; Cao, Guixin ^[3]; Cantoni, Claudia ^[1]; May, Andrew F ^[1]; Cao, Huibo B. ^[1]; Aczel, Adam A. ^[1]; Matsuda, Masaaki ^[1]; Choi, Yongseong ^[2]; Haskel, Daniel ^[2]; Sales, B. C. ^[4]; Mandrus, David ^[3]; Lumsden, Mark D. ^[1]; Christianson, Andrew D. ^[3]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Laboratory (ORNL)

We investigate the magnetic properties of the series Sr₂Ir_1-xRu_xO₄ with neutron, resonant x-ray and magnetization measurements. The results indicate an evolution and coexistence of magnetic structures via a spin flop transition from ab-plane to c-axis collinear order as the 5d Ir4⁺ ions are replaced with an increasing concentration of 4d Ru4⁺ ions. The magnetic structures within the ordered regime of the phase diagram (x<0.3) are reported. Despite the changes in magnetic structure no alteration of the J_eff=1/2 ground state is observed. This behavior of Sr₂Ir_1-xRu_xO₄ is consistent with electronic phase separation and diverges from a standard scenario of hole doping. The role of lattice alterations with doping on the magnetic and insulating behavior is considered. Our results presented here provide insight into the magnetic insulating states in strong spin-orbit coupled materials and the role perturbations play in altering the behavior.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725; AC02-06CH11357

OSTI ID:: 1237619

Alternate ID(s):: OSTI ID: 1224377

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 16; ISSN 1098-0121

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 34 works

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The J _eff = 1/2 Antiferromagnet Sr ₂ IrO ₄ : A Golden Avenue toward New Physics and Functions Lu, Chengliang; Liu, Jun‐Ming Advanced Materials https://doi.org/10.1002/adma.201904508	journal	October 2019
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Title: Evolution of competing magnetic order in the J_eff=1/2 insulating state of Sr₂Ir_1-xRu_xO₄