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 |
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 |
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Date Type: | Publication |
Status: | Published |
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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