Magnetic Order in the Pyrochlore Iridates A2Ir2O7 (A = Y, Yb)

S. M. Disseler; Chetan Dhital; A. Amato; S. R. Giblin; Clarina de la Cruz; Stephen D. Wilson; M. J. Graf

doi:10.1103/PhysRevB.86.014428

Magnetic Order in the Pyrochlore Iridates A2Ir2O7 (A = Y, Yb)

Strongly Correlated Electrons 2012-08-08 v1

Authors: S. M. Disseler , Chetan Dhital , A. Amato , S. R. Giblin , Clarina de la Cruz , Stephen D. Wilson , M. J. Graf

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Abstract

We present results from muon spin relaxation/rotation, magnetization, neutron scattering and transport measurements on polycrystalline samples of the pyrochlore iridates Y2Ir2O7 (Y-227) and Yb2Ir2O7 (Yb-227). Well-defined spontaneous oscillations of the muon asymmetry are observed together with hysteretic behavior in magnetization below 130 K in Yb-227, indicative of commensurate long-range magnetic order. Similar oscillations are observed in Y-227 below 150 K; however the onset of hysteretic magnetization at T = 190 K indicates a transition to an intermediate state lacking long-range order as observed in Nd-227. Our results also show that insulating members of the iridate family have nearly identical magnetic ground states, and that the presence of magnetic A-site species does not play any significant role in altering the ground state properties.

Keywords

frustrated magnetism

Cite

@article{arxiv.1203.6669,
  title  = {Magnetic Order in the Pyrochlore Iridates A2Ir2O7 (A = Y, Yb)},
  author = {S. M. Disseler and Chetan Dhital and A. Amato and S. R. Giblin and Clarina de la Cruz and Stephen D. Wilson and M. J. Graf},
  journal= {arXiv preprint arXiv:1203.6669},
  year   = {2012}
}

Magnetic Order in the Pyrochlore Iridates A2Ir2O7 (A = Y, Yb)

Abstract

Keywords

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