Journal Article

FZJ-2023-02793

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Low-temperature antiferromagnetic order in orthorhombic CePdAl 3

Kumar, V. (Corresponding author) ; Bauer, A. ; Franz, C.FZJ* ; Spallek, J. ; Schönmann, R. ; Stekiel, M.FZJ* ; Schneidewind, A.FZJ* ; Wilde, M. A. ; Pfleiderer, C. (Last author)TUM*

2023
APS College Park, MD

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Please use a persistent id in citations: doi:10.1103/PhysRevResearch.5.023157  doi:10.34734/FZJ-2023-02793

Abstract: We report the magnetization, ac susceptibility, and specific heat of optically float-zoned single crystals of CePdAl3. In comparison to the properties of polycrystalline CePdAl3 reported in the literature, which displays a tetragonal crystal structure and no long-range magnetic order, our single crystals exhibit an orthorhombic structure (Cmcm) and antiferromagnetic order below a Néel temperature T1=5.6 K. The specific heat at zero field shows two anomalies, namely, a broad transition at T1=5.6 K followed by a λ-anomaly at T2=5.4 K. A conservative estimate of the Sommerfeld coefficient of the electronic specific heat, γ=121mJK−2mol−1, indicates a moderately enhanced heavy-fermion ground state. A twin microstructure evolves in the family of planes spanned by the basal plane lattice vectors ao and co , with the magnetic hard axis bo common to all twins. The antiferromagnetic state is characterized by a strong ao, co easy-plane magnetic anisotropy where the ao direction is the easy axis in the easy plane. A spin-flop transition induced under magnetic field along the easy directions, results in complex magnetic phase diagrams. Taken together, our results reveal a high sensitivity of the magnetic and electronic properties of CePdAl3 to its structural modifications.

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

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Streumethoden (JCNS-2)
3. JCNS-4 (JCNS-4)
4. Heinz Maier-Leibnitz Zentrum (MLZ)
5. Molekulare Organisation des Gehirns (INM-2)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
3. DFG project 323760292 - Mehrkomponentige Elektronische Korrelationen in Nicht-Zentrosymmetrischen f-Elektron-Verbindungen (323760292) (323760292)
4. DFG project 390814868 - EXC 2111: Munich Center for Quantum Science and Technology (MCQST) (390814868) (390814868)
5. TOPFIT - Topological Spin Solitons for Information Technology (291079) (291079)
6. ExQuiSid - Extreme Quantum Matter in Solids (788031) (788031)
7. DFG project 360506545 - SPP 2137: Skyrmionics: Topologische Spin-Phänomene im Realraum für Anwendungen (360506545) (360506545)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2023

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Database coverage:
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