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Title

Raman spectroscopic evidence for multiferroicity in rare earth nickelate single crystals

Authors
Mazzone, D. G.
Gawryluk, D. J.
Medarde, M.
Published in Physical review research. 2021, vol. 3, no. 033007
Abstract The rare earth nickelates RNiO3 are metallic at high temperatures and insulating and magnetically ordered at low temperatures. The low temperature phase has been predicted to be type II multiferroic, i.e., ferroelectricand magnetic order are coupled and occur simultaneously. Confirmation of those ideas has been inhibited bythe absence of experimental data on single crystals. Here we report on Raman spectroscopic data of RNiO3 single crystals (R=Y, Er, Ho, Dy, Sm, Nd) for temperatures between 10 and 1000 K. Entering the magnetically ordered phase we observe the appearance of a large number of additional vibrational modes, implying a breaking of inversion symmetry expected for multiferroic order.
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Research groups Groupe Kuzmenko
Groupe Van der Marel
Project
Swiss National Science Foundation: 200020_179157
Citation
(ISO format)
ARDIZZONE, Ivan et al. Raman spectroscopic evidence for multiferroicity in rare earth nickelate single crystals. In: Physical Review Research, 2021, vol. 3, n° 033007. doi: 10.1103/PhysRevResearch.3.033007 https://archive-ouverte.unige.ch/unige:152753

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Deposited on : 2021-07-05

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