4f spin driven ferroelectric-ferromagnetic multiferroicity in PrMn2 O5 under a magnetic field

S. Chattopadhyay, V. Balédent, S. K. Panda, Sh Yamamoto, F. Duc, T. Herrmannsdörfer, M. Uhlarz, T. Gottschall, O. Mathon, Z. Wang, C. Strohm, M. Greenblatt, P. Foury-Leylekian, J. Wosnitza

Research output: Contribution to journalArticlepeer-review

Abstract

In contrast to all other members of the RMn2O5 family with nonzero 4f electrons (R = Nd to Lu), PrMn2O5 does not show any spin driven ferroelectricity in the magnetically ordered phase. By means of high-field electric polarization measurements up to 45 T, we have found that this exceptional candidate undergoes a spin driven multiferroic phase under magnetic field. X-ray magnetic circular dichroism studies up to 30 T at the Pr L2 edge show that this ferroelectricity originates from and directly couples to the ferromagnetic component of the Pr3+ spins. Experimental observations along with our generalized gradient-approximation +U calculations reveal that this exotic ferroelectric-ferromagnetic combination stabilizes through the exchange-striction mechanism solely driven by a 3d-4f-type coupling, as opposed to the other RMn2O5 members with 3d-3d driven ferroelectric-antiferromagnetic-type conventional type-II multiferroicity.

Original languageEnglish (US)
Article number094408
JournalPhysical Review B
Volume102
Issue number9
DOIs
StatePublished - Sep 1 2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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