Spin dynamics in IrSr2Sm1.15Ce0.85Cu2O10

Complex magnetic behavior in a layered iridocuprate

R. H. Colman*, P. Manuel, D. D. Khalyavin, A. D. Hillier, A. C. Mclaughlin

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

A muon spin rotation (mu SR), neutron, and synchrotron diffraction study of the reentrant spin-glass material IrSr2Sm1.15Ce0.85Cu2O10 is presented. The synthesis has been optimized, and Rietveld refinement of the diffraction patterns shows no sign of the previously reported Ir/Cu cation exchange but confirms the structure along with the disordered tilts and rotations of IrO6 octahedra. The zero-field-mu SR response indicates a complex temperature dependence to the magnetism with multiple transitions that are confirmed to be bulk phenomena. Consecutive transitions are reported at t(1) = 140, t(2) = 20, and t(3) = 6 K. The broad transition at 140 K is assigned to antiferromagnetic ordering of Ir4+ spins with a stripe spin structure. The low-temperature transitions are a result of antiferromagnetic ordering of Cu2+ spins followed by the freezing of a disordered Ir spin component, further evidenced by a strong damping of the oscillation amplitude below 6 K. These observations confirm the bulk nature of the previously reported reentrant spin-glass behavior of this complex magnetic system.

Original languageEnglish
Article number184408
Number of pages7
JournalPhysical Review B Condensed Matter and Materials Physics
Volume88
Issue number18
DOIs
Publication statusPublished - 12 Nov 2013

Keywords

  • superconductivity
  • glass
  • magnetoresistances
  • neutron
  • system
  • family
  • LA

Cite this

Spin dynamics in IrSr2Sm1.15Ce0.85Cu2O10 : Complex magnetic behavior in a layered iridocuprate. / Colman, R. H.; Manuel, P.; Khalyavin, D. D.; Hillier, A. D.; Mclaughlin, A. C.

In: Physical Review B Condensed Matter and Materials Physics , Vol. 88, No. 18, 184408, 12.11.2013.

Research output: Contribution to journalArticle

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abstract = "A muon spin rotation (mu SR), neutron, and synchrotron diffraction study of the reentrant spin-glass material IrSr2Sm1.15Ce0.85Cu2O10 is presented. The synthesis has been optimized, and Rietveld refinement of the diffraction patterns shows no sign of the previously reported Ir/Cu cation exchange but confirms the structure along with the disordered tilts and rotations of IrO6 octahedra. The zero-field-mu SR response indicates a complex temperature dependence to the magnetism with multiple transitions that are confirmed to be bulk phenomena. Consecutive transitions are reported at t(1) = 140, t(2) = 20, and t(3) = 6 K. The broad transition at 140 K is assigned to antiferromagnetic ordering of Ir4+ spins with a stripe spin structure. The low-temperature transitions are a result of antiferromagnetic ordering of Cu2+ spins followed by the freezing of a disordered Ir spin component, further evidenced by a strong damping of the oscillation amplitude below 6 K. These observations confirm the bulk nature of the previously reported reentrant spin-glass behavior of this complex magnetic system.",
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AB - A muon spin rotation (mu SR), neutron, and synchrotron diffraction study of the reentrant spin-glass material IrSr2Sm1.15Ce0.85Cu2O10 is presented. The synthesis has been optimized, and Rietveld refinement of the diffraction patterns shows no sign of the previously reported Ir/Cu cation exchange but confirms the structure along with the disordered tilts and rotations of IrO6 octahedra. The zero-field-mu SR response indicates a complex temperature dependence to the magnetism with multiple transitions that are confirmed to be bulk phenomena. Consecutive transitions are reported at t(1) = 140, t(2) = 20, and t(3) = 6 K. The broad transition at 140 K is assigned to antiferromagnetic ordering of Ir4+ spins with a stripe spin structure. The low-temperature transitions are a result of antiferromagnetic ordering of Cu2+ spins followed by the freezing of a disordered Ir spin component, further evidenced by a strong damping of the oscillation amplitude below 6 K. These observations confirm the bulk nature of the previously reported reentrant spin-glass behavior of this complex magnetic system.

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