Journal Article

FZJ-2015-00936

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Distinct itinerant spin-density waves and local-moment antiferromagnetism in an intermetallic ErPd2Si2 single crystal

Cao, C. ; Wildes, A. ; Schmidt, W.FZJ* ; Schmalzl, K.FZJ* ; Hou, B. ; Regnault, L.-P. ; Zhang, C. ; Meuffels, P.FZJ* ; Löser, W. ; Roth, G. ; Li, H. (Corresponding Author)

2015
Nature Publishing Group London

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/8305  doi:10.1038/srep07968

Abstract: 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.

---

Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Streumethoden (PGI-4)
3. JARA-FIT (JARA-FIT)
4. JCNS-ILL (JCNS-ILL)
5. Elektronische Materialien (PGI-7)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)
2. 524 - Controlling Collective States (POF3-524) (POF3-524)
3. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
4. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Appears in the scientific report 2015

---

Database coverage:
; ; ; ; BIOSIS Previews ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

---