Linear magnetoresistance in the all-in-all-out antiferromagnet Cd2Os2O7

The pyrochlore Cd₂Os₂O₇ undergoes a metal-insulator transition at 227 K, concomitant with a formation of all-in-all-out magnetic ordering. Here, we explore the magnetoresistance associated with this magnetic order, which manifests an odd-parity linear functional form. This form, recently reported in the related compounds Eu₂Ir₂O₇, is allowed by the Onsager relationship for antiferromagnetic materials; however the microscopic origin is still unclear. By systematically studying a range of galvanomagnetic measurement configurations, we are able offer potential mechanisms for understanding this linear magnetoresistance involving transport both in the bulk and along the magnetic domain walls.

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Bulletin of the American Physical Society

APS March Meeting 2019

Volume 64, Number 2

Monday–Friday, March 4–8, 2019; Boston, Massachusetts

Session H06: Frustrated Lattices: Kitaev, Pyrochlore, and Others

Abstract: H06.00008 : Linear magnetoresistance in the all-in-all-out antiferromagnet Cd2Os2O7

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Abstract: H06.00008 : Linear magnetoresistance in the all-in-all-out antiferromagnet Cd₂Os₂O₇