Journal Article

FZJ-2019-00744

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spiral magnetic ordering of the Eu moments in EuNi$_2$As$_2$

Jin, W. (Corresponding author)Extern* ; Qureshi, N. ; Bukowski, Z. ; Xiao, Y. ; Nandi, S.FZJ* ; Babij, M. ; Fu, Z. ; Su, Y.FZJ* ; Brückel, T.FZJ*

2019
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/21456  doi:10.1103/PhysRevB.99.014425

Abstract: The ground-state magnetic structure of EuNi2As2 was investigated by single-crystal neutron diffraction. At base temperature, the Eu2+ moments are found to form an incommensurate antiferromagnetic spiral-like structure with a magnetic propagation vector of k=(0,0,0.92). They align ferromagnetically in the ab plane with the moment size of 6.75(6) μB, but rotate spirally by 165.6(1)∘ around the c axis from layer to layer. The magnetic order parameter in the critical region close to the ordering temperature TN=15 K shows critical behavior with a critical exponent of βEu=0.35(2), consistent with the three-dimensional Heisenberg model. Moreover, within the experimental uncertainty, our neutron data are consistent with a model in which the Ni sublattice is not magnetically ordered.

Keyword(s): Magnetic Materials (1st) ; Condensed Matter Physics (2nd) ; Magnetism (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Streumethoden (JCNS-2)
3. Streumethoden (PGI-4)
4. JARA-FIT (JARA-FIT)

Research Program(s):

1. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. Measurement at external facility

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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