Journal Article

FZJ-2019-02650

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Intermultiplet transitions and magnetic long-range order in Sm-based pyrochlores

Peçanha-Antonio, V. (Corresponding author)FZJ* ; Feng, E.FZJ* ; Sun, X.FZJ* ; Adroja, D. ; Walker, H. C. ; Gibbs, A. S. ; Orlandi, F. ; 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/2128/22079  doi:10.1103/PhysRevB.99.134415

Abstract: We present bulk and neutron scattering measurements performed on the isotopically enriched 154Sm2Ti2O7 and 154Sm2Sn2O7 samples. Both compounds display sharp heat capacity anomalies, at 350 and 440 mK, respectively. Inelastic neutron scattering measurements are employed to determine the crystalline electric field (CEF) level scheme, which includes transitions between the ground-state and first excited J multiplets of the Sm3+ ion. To further validate those results, the single-ion magnetic susceptibility of the compounds is calculated and compared with the experimental dc-susceptibility measured in low applied magnetic fields. It is demonstrated that the inclusion of intermultiplet transitions in the CEF analysis is fundamental to the understanding of the intermediate and, more importantly, low-temperature magnetic behavior of the Sm-based pyrochlores. Finally, the heat capacity anomaly is shown to correspond to the onset of an all-in-all-out long-range order in the stannate sample, while in the titanate a dipolar long-range order can be only indirectly inferred.

Keyword(s): Basic research (1st) ; 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. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
2. 524 - Controlling Collective States (POF3-524) (POF3-524)
3. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
4. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)

Experiment(s):

1. DNS: Diffuse scattering neutron time of flight spectrometer (NL6S)

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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