Journal Article

FZJ-2019-04874

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Spin fluctuations in Sr 1.6 Ba 0.4 RuO 4 : An inelastic neutron scattering study with polarization analysis

Li, Z. W. (Corresponding author) ; Guo, H. ; Liu, C.-F. ; Bourdarot, F. ; Schmidt, W.FZJ* ; Skoulatos, M. ; Komarek, A. C.

2017
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/23054  doi:10.1103/PhysRevB.95.045105

Abstract: We present inelastic neutron scattering measurements on the ruthenate Sr1.6Ba0.4RuO4 which is on the hitherto almost unknown Ba-substituted side of the doping phase diagram of Sr2−xAexRuO4 (Ae = Ca, Ba). Unlike the Ca-substituted side of the phase diagram no (quasi)static magnetic peaks can be observed in Sr1.6Ba0.4RuO4. Instead, incommensurate spin fluctuations can be observed around q0=(±0.3,±0.3,0). Both the absolute intensity of χ''(Q,ω) and its energy and temperature dependence as well as the anisotropy ratio χ''c/χ''a,b resemble the ones in Sr2RuO4. Hence, a random potential implied by the substitution of huge Ba ions as well as the induced increase of interatomic distances has less impact on the magnetic properties than octahedral tilts implied by Ca substitution. Moreover, any ferromagnetic spin fluctuations are either absent in Sr1.6Ba0.4RuO4 or below the detection limit.

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Contributing Institute(s):

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

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)
2. 524 - Controlling Collective States (POF3-524) (POF3-524)
3. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
4. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
5. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. ILL-IN12: Cold neutron 3-axis spectrometer

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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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