TY  - JOUR
AU  - Cao, Chongde
AU  - Wildes, Andrew
AU  - Schmidt, Wolfgang
AU  - Schmalzl, Karin
AU  - Hou, Binyang
AU  - Regnault, Louis-Pierre
AU  - Zhang, Cong
AU  - Meuffels, Paul
AU  - Löser, Wolfgang
AU  - Roth, Georg
AU  - Li, Haifeng
TI  - Distinct itinerant spin-density waves and local-moment antiferromagnetism in an intermetallic ErPd2Si2 single crystal
JO  - Scientific reports
VL  - 5
SN  - 2045-2322
CY  - London
PB  - Nature Publishing Group
M1  - FZJ-2015-00936
SP  - 7968
PY  - 2015
AB  - Identifying the nature of magnetism, itinerant or localized, remains a major challenge in condensed-matter science. Purely localized moments appear only in magnetic insulators, whereas itinerant moments more or less co-exist with localized moments in metallic compounds such as the doped-cuprate or the iron-based superconductors, hampering a thorough understanding of the role of magnetism in phenomena like superconductivity or magnetoresistance. Here we distinguish two antiferromagnetic modulations with respective propagation wave vectors at Q± = (H ± 0.557(1), 0, L ± 0.150(1)) and QC = (H ± 0.564(1), 0, L), where (H, L) are allowed Miller indices, in an ErPd2Si2 single crystal by neutron scattering and establish their respective temperature- and field-dependent phase diagrams. The modulations can co-exist but also compete depending on temperature or applied field strength. They couple differently with the underlying lattice albeit with associated moments in a common direction. The Q± modulation may be attributed to localized 4f moments while the QC correlates well with itinerant conduction bands, supported by our transport studies. Hence, ErPd2Si2 represents a new model compound that displays clearly-separated itinerant and localized moments, substantiating early theoretical predictions and providing a unique platform allowing the study of itinerant electron behavior in a localized antiferromagnetic matrix.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000348165800001
DO  - DOI:10.1038/srep07968
UR  - https://juser.fz-juelich.de/record/187263
ER  -