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Field-induced reentrant magnetoelectric phase in LiNiPO4

TitleField-induced reentrant magnetoelectric phase in LiNiPO4
Publication TypeJournal Article
Year of Publication2017
AuthorsToft-Petersen, R, Fogh, E, Kihara, T, Jensen, J, Fritsch, K, Lee, J, Granroth, GE, Stone, MB, Vaknin, D, Nojiri, H, Christensen, NB
JournalPhysical Review B
Date Published02
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000394657300010
Keywordsferromagnetism, magnetic-fields, memory, multiferroics, physics, polarization

Using pulsed magnetic fields up to 30 T we have measured the bulk magnetization and electrical polarization of LiNiPO4 and have studied its magnetic structure by time-of-flight neutron Laue diffraction. Our data establish the existence of a reentrant magnetoelectric phase between 19 T and 21 T. We show that a magnetized version of the zero field commensurate structure explains the magnetoelectric response quantitatively. The stability of this structure suggests a field-dependent spin anisotropy. Above 21 T, amagnetoelectrically inactive, short-wavelength incommensurate structure is identified. Our results demonstrate the combination of pulsed fields with epithermal neutron Laue diffraction as a powerful method to probe even complex phase diagrams in strong magnetic fields.

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Alternate JournalPhys. Rev. B