Coherent charge and magnetic ordering in Ho/Y superlattice revealed by element-selective x-ray scattering

Ukleev, VPaul Scherrer Inst, Lab Neutron Scattering & Imaging LNS, CH-5232 Villigen, Switzerland. (författare)

QC 20191129
Magnetic rare-earth/nonmagnetic metal superlattices are well-known to display chiral spin helices in the rare-earth layers that propagate coherently across the nonmagnetic layers. However, the underlying mechanism that preserves the magnetic phase and chirality coherence across the nonmagnetic layers has remained elusive. In this paper, we use resonant and element-specific x-ray scattering to evidence directly the formation of two fundamentally different long-range modulations in a holmium/yttrium (Ho/Y) multilayer: the known Ho chiral spin helix with periodicity 25 angstrom and a newly observed charge density wave with periodicity 16 angstrom that propagates through both the Ho and nonmagnetic Y layer. With x-ray circular magnetic dichroism measurements ruling out the existence of a magnetic proximity effect induced moment in the nonmagnetic Y layers, we propose that the charge density wave is also chiral, thus providing the means for the transmittance of magnetic chirality coherence between Ho layers.

Tarnavich, VNatl Res Ctr, Kurchatov Inst, Petersburg Nucl Phys Inst, Gatchina 188300, Russia. (författare)
Tartakovskaya, E.Natl Acad Sci Ukraine, Inst Magnetism, UA-03142 Kiev, Ukraine.;Kiev Natl Univ, Inst High Technol, UA-03022 Kiev, Ukraine. (författare)
Lott, D.Helmholtz Zentrum Geesthacht, Inst Mat Res, Max Planck Str 1, D-21502 Geesthacht, Germany. (författare)
Kapaklis, Vassilios,1978-Uppsala universitet,Materialfysik(Swepub:uu)vaska415 (författare)
Oleshkevych, AnnaUppsala universitet,KTH,Yt- och korrosionsvetenskap,Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden.,Materialfysik,KTH Royal Inst Technol, S-10044 Stockholm, Sweden(Swepub:uu)annol118 (författare)
Gargiani, P.ALBA Synchrotron Light Source, CELLS Expt Div, E-08290 Barcelona, Spain. (författare)
Valvidares, M.ALBA Synchrotron Light Source, CELLS Expt Div, E-08290 Barcelona, Spain. (författare)
White, J. S.Paul Scherrer Inst, Lab Neutron Scattering & Imaging LNS, CH-5232 Villigen, Switzerland. (författare)
Grigoriev, S. , V (författare)
Paul Scherrer Inst, Lab Neutron Scattering & Imaging LNS, CH-5232 Villigen, Switzerland.Natl Res Ctr, Kurchatov Inst, Petersburg Nucl Phys Inst, Gatchina 188300, Russia. (creator_code:org_t)

Av författaren/redakt...: Ukleev, V; Tarnavich, V; Tartakovskaya, E ...; Lott, D.; Kapaklis, Vassil ...; Oleshkevych, Ann ...; visa fler...; Gargiani, P.; Valvidares, M.; White, J. S.; Grigoriev, S. , ...; visa färre...

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