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arXiv · 1702.00273

A new magnetic phase in the nickelate perovskite TlNiO$_3$

L. Korosec·M. Pikulski·T. Shiroka·M. Medarde·H. Luetkens·J. A. Alonso·H. R. Ott·J. Mesot
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Abstract

The RNiO$_3$ perovskites are known to order antiferromagnetically below a material-dependent N\'eel temperature $T_\text{N}$. We report experimental evidence indicating the existence of a second magnetically-ordered phase in TlNiO$_3$ above $T_\text{N} = 104$ K, obtained using nuclear magnetic resonance and muon spin rotation spectroscopy. The new phase, which persists up to a temperature $T_\text{N}^* = 202$ K, is suppressed by the application of an external magnetic field of approximately 1 T. It is not yet known if such a phase also exists in other perovskite nickelates.

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L. Korosec, M. Pikulski, T. Shiroka, M. Medarde, H. Luetkens, J. A. Alonso, H. R. Ott, J. Mesot. 2017-02-01. A new magnetic phase in the nickelate perovskite TlNiO$_3$. https://doi.org/10.1103/physrevb.95.060411

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