Magnetization and Hall effect studies on the pyrochlore iridate Nd2Ir2O7

Disseler, S. M., Giblin, Sean ORCID: https://orcid.org/0000-0003-1876-8619, Dhital, Chetan, Lukas, K. C., Wilson, Stephen D. and Graf, M. J. 2013. Magnetization and Hall effect studies on the pyrochlore iridate Nd2Ir2O7. Physical Review B: Condensed Matter and Materials Physics 87 (6) , 060403. 10.1103/PhysRevB.87.060403

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Abstract

We present magnetization and Hall effect measurements on the pyrochlore iridate Nd 2 Ir 2 O 7 . Previous muon spin rotation measurements have shown that the system undergoes an unusual transition at T M ≈110 K into a magnetic phase lacking long-range order, followed by a transition at T LRO ≈6 K into a state with long-range magnetic order. We observe a small remnant magnetization when cycling through a zero magnetic field at temperatures below T M . Below T LRO , this remnant magnetization increases sharply, and additional hysteresis effects appear at a higher field B c = 2.5 T, while the Hall resistance develops a nonmonotonic and hysteretic magnetic field dependence, with a maximum at B c and signatures of an anomalous Hall effect. The dependence on field sweep direction demonstrates a nontrivial transition into a magnetically ordered state with properties paralleling those of known spin-ice systems and suggests a spin reorientation transition across the metal-insulator transition in the A -227 series.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	American Physical Society
ISSN:	1098-0121
Last Modified:	25 Oct 2022 08:41
URI:	https://orca.cardiff.ac.uk/id/eprint/53978

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