Raman spectroscopic evidence for multiferroicity in rare earth nickelate single crystals
| Autor: | D. van der Marel, I. Ardizzone, Alexey B. Kuzmenko, D. G. Mazzone, D. J. Gawryluk, Jérémie Teyssier, I. Crassee, Marisa Medarde |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Strongly Correlated Electrons (cond-mat.str-el) Point reflection FOS: Physical sciences Order (ring theory) 02 engineering and technology ddc:500.2 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity 3. Good health Metal Crystallography symbols.namesake Condensed Matter - Strongly Correlated Electrons visual_art Molecular vibration Phase (matter) 0103 physical sciences visual_art.visual_art_medium symbols Multiferroics 010306 general physics 0210 nano-technology Raman spectroscopy |
| Zdroj: | Physical Review Research, Vol. 3, No 033007 (2021) |
| ISSN: | 2643-1564 |
| Popis: | 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. ferroelectric and magnetic order are coupled and occur simultaneously. Confirmation of those ideas has been inhibited by the 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 K 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. 10 pages, 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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