Weak magnetic transitions in pyrochlore Bi2Ir2O7

Baker, P.J.; Möller, J.S.; Pratt, F.L.; Hayes, W.; Blundell, S.J.; Lancaster, T.; Qi, T.F.; Cao, G.

doi:10.1103/physrevb.87.180409

Weak magnetic transitions in pyrochlore Bi2Ir2O7

Baker, P.J.; Möller, J.S.; Pratt, F.L.; Hayes, W.; Blundell, S.J.; Lancaster, T.; Qi, T.F.; Cao, G.

Authors

P.J. Baker

J.S. Möller

F.L. Pratt

W. Hayes

S.J. Blundell

Professor Tom Lancaster tom.lancaster@durham.ac.uk
Professor

T.F. Qi

G. Cao

Abstract

Muon spin relaxation measurements on Bi 2 Ir 2 O 7 show that it undergoes a bulk magnetic transition at 1.84(3) K. This is accompanied by increases in the muon spin relaxation rate and the amplitude of the nonrelaxing part of the signal. The magnetic field experienced by muons is estimated to be 0.7 mT at low temperature, around two orders of magnitude smaller than that in other pyrochlore iridates. These results suggest that the low-temperature state represents static magnetism of exceptionally small magnetic moments, ∼ 0.01μ B /Ir. The relaxation rate increases further below 0.23(4) K, coincident with an upturn in the specific heat, suggesting the existence of a second low-temperature magnetic transition.

Citation

Baker, P., Möller, J., Pratt, F., Hayes, W., Blundell, S., Lancaster, T., …Cao, G. (2013). Weak magnetic transitions in pyrochlore Bi2Ir2O7. Physical review B, 87(18), Article 180409. https://doi.org/10.1103/physrevb.87.180409

Journal Article Type	Article
Publication Date	May 1, 2013
Deposit Date	Jul 2, 2013
Publicly Available Date	Jan 24, 2014
Journal	Physical Review B
Print ISSN	1098-0121
Electronic ISSN	1550-235X
Publisher	American Physical Society
Peer Reviewed	Peer Reviewed
Volume	87
Issue	18
Article Number	180409
DOI	https://doi.org/10.1103/physrevb.87.180409