TY  - JOUR
AU  - Kumar, Vivek
AU  - Bauer, Andreas
AU  - Franz, Christian
AU  - Spallek, Jan
AU  - Schönmann, Rudolf
AU  - Stekiel, Michal
AU  - Schneidewind, Astrid
AU  - Wilde, Marc A.
AU  - Pfleiderer, C.
TI  - Low-temperature antiferromagnetic order in orthorhombic CePdAl 3
JO  - Physical review research
VL  - 5
IS  - 2
SN  - 2643-1564
CY  - College Park, MD
PB  - APS
M1  - FZJ-2023-02793
SP  - 023157
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001021832800001
DO  - DOI:10.1103/PhysRevResearch.5.023157
UR  - https://juser.fz-juelich.de/record/1009389
ER  -