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Magnetic order in the pyrochlore iridates A(2)Ir(2)O(7) (A = Y, Yb)

Disseler, S. M., Dhital, C., Amato, A., Giblin, Sean, de la Cruz, C., Wilson, S. D. and Graf, M. J. 2012. Magnetic order in the pyrochlore iridates A(2)Ir(2)O(7) (A = Y, Yb). Physical Review B Condensed Matter and Materials Physics 86 (1) , 014428. 10.1103/PhysRevB.86.014428

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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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 1098-0121
Last Modified: 04 Jun 2017 04:37
URI: http://orca.cf.ac.uk/id/eprint/41521

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