Journal Article

PUBDB-2016-05373

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Analysis of modulated $Ho_{2}PdSi_{3}$ crystal structure at Pd K and Ho L absorption edges using resonant elastic X-scattering

Nentwich, M. (Corresponding author)Extern* ; Zschornak, M.Extern* ; Richter, C.Extern* ; Novikov, D.DESY* ; Meyer, D. C.

2016
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/0953-8984/28/6/066002

Abstract: Replacing Si atoms with a transition metal in rare earth disilicides results in a family of intermetallic compounds with a variety of complex magnetic phase transitions. In particular, the family R 2PdSi3 shows interesting magnetic behavior arising from the electronic interaction of the R element with the transition metal in the Si network, inducing the specific structure of the related phase. Within this series, the highest degree of superstructural order was reported for the investigated representative Ho2PdSi3, although several competing superstructures have been proposed in literature.The diffraction anomalous fine structure (DAFS) method is highly sensitive to the local structure of chosen atoms at specific positions within the unit cell of a crystalline phase. In combination with x-ray absorption fine structure (XAFS), this sophisticated synchrotron method has been applied in the present work to several selected reflections, i.a. a satellite reflection. Extensive electronic modeling was used to test the most relevant structure proposals. The $2\times 2\times 8$ superstructure has been strongly confirmed, although a small amount of disorder in the modulation is very probable.

Note: (c) IOP Publishing Ltd. Post referee full text in progress (embargo 1 year from 20 January 2016).

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Contributing Institute(s):

1. DOOR-User (DOOR)
2. PETRA III Extension (FS-PEX)

Research Program(s):

1. 6214 - Nanoscience and Materials for Information Technology (POF3-621) (POF3-621)

Experiment(s):

1. DORIS Beamline BW1 (DORIS III)
2. DORIS Beamline E2 (DORIS III)

Appears in the scientific report 2016

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; National-Konsortium ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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