Magnetoelectric coupling in isotopically substituted TbMn16/18O3 and RMn2O5 (R=Tb, Ho and Y) explored by Raman light spectroscopy

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dc.contributor.authorGraham, PJen_AU
dc.contributor.authorRovillian, Pen_AU
dc.contributor.authorMulders, AMen_AU
dc.contributor.authorYethiraj, Men_AU
dc.contributor.authorArgyriou, Den_AU
dc.contributor.authorPomjakushina, Een_AU
dc.contributor.authorCondor, Ken_AU
dc.contributor.authorKenzelmann, Men_AU
dc.contributor.authorUlrich, Cen_AU
dc.date.accessioned2022-08-25T01:00:31Zen_AU
dc.date.available2022-08-25T01:00:31Zen_AU
dc.date.issued2014-02-04en_AU
dc.date.statistics2021-09-13en_AU
dc.description.abstractMultiferroic materials demonstrate excellent potential for next-generation multifunctional devices, as they exhibit coexisting ferroelectric and magnetic orders. In magnetoelectric multiferroics, the existing coupling between both properties offers a unique possibility to manipulate ferroelectricity via magnetic order and vice versa opening unexpected new potential for high-density information storage and sensor applications. At present, the underlying physics of the magnetoelectric coupling is not fully understood, and competing theories propose conflicting experimental outcomes. By studying the lattice and magnetic excitations via Raman light scattering, we have obtained insight into the various coupling mechanism in multiferroic materials like TbMnO3 and RMn2O5 (R = Tb, Ho, and Y). Raman light scattering experiments were performed on TbMn16/18O3 oxygen-isotopesubstituted single crystals. Pronounced anomalies in sign and strength of the phonon shifts at the magnetic phase transition at 43 K and the ferroelectric phase transition at 28 K indicate an interaction between the lattice and the magnetic and electric ordering, providing information about the nature of the competing magnetic interactions present in this compound. Our Raman light scattering experiments on RMn2O5 (R = Tb, Ho, and Y) revealed opposite spin-phonon interactions for R = magnetic Tb and Ho, in contrast to non-magnetic Y. This offers a unique insight in the various competing spin exchange interactions, which lead to the highly frustrated spin structure and finally the multiferroic properties of RMn2O5. Using single crystal neutron diffraction at high magnetic fields (up to 11 T) we were able to determine a theoretically proposed but hitherto unobserved crystallographic phase transition, which naturally explains the origin of the ferroelectric polarization.en_AU
dc.identifier.citationGraham, P. J., Rovillain, P., Mulders, A. M., Yethiraj, M., Argyriou, D., Pomjakushina, E., Condor, K., Kenzelmann, M. & Ulrich, C. (2014). Magnetoelectric coupling in isotopically substituted TbMn16/18O3 and RMn2O5 (R=Tb, Ho and Y) explored by Raman light spectroscopy. Paper presented at the 38th Annual Condensed Matter and Materials Meeting 2014, Waiheke Island Resort, Waiheke, Auckland, New Zealand 4th February - 7th February, 2014. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2014/Wagga2014proceedings.pdfen_AU
dc.identifier.conferenceenddate7 February 2014en_AU
dc.identifier.conferencename38th Annual Condensed Matter and Materials Meeting 2014en_AU
dc.identifier.conferenceplaceAuckland, New Zealanden_AU
dc.identifier.conferencestartdate4 February 2014en_AU
dc.identifier.isbn978-0-646-93339-9en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2014/Wagga2014proceedings.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13601en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectCoherent scatteringen_AU
dc.subjectCrystal structureen_AU
dc.subjectDiffractionen_AU
dc.subjectLaser spectroscopyen_AU
dc.subjectOrientationen_AU
dc.subjectPhysical propertiesen_AU
dc.subjectQuasi particlesen_AU
dc.subjectScatteringen_AU
dc.subjectSpectroscopyen_AU
dc.titleMagnetoelectric coupling in isotopically substituted TbMn16/18O3 and RMn2O5 (R=Tb, Ho and Y) explored by Raman light spectroscopyen_AU
dc.typeConference Abstracten_AU
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