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001009389 0247_ $$2doi$$a10.1103/PhysRevResearch.5.023157
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001009389 1001_ $$00000-0003-0018-5562$$aKumar, Vivek$$b0$$eCorresponding author
001009389 245__ $$aLow-temperature antiferromagnetic order in orthorhombic CePdAl 3
001009389 260__ $$aCollege Park, MD$$bAPS$$c2023
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001009389 520__ $$aWe report the magnetization, ac susceptibility, and specific heat of optically float-zoned single crystals of CePdAl3. In comparison to the properties of polycrystalline CePdAl3 reported in the literature, which displays a tetragonal crystal structure and no long-range magnetic order, our single crystals exhibit an orthorhombic structure (Cmcm) and antiferromagnetic order below a Néel temperature T1=5.6 K. The specific heat at zero field shows two anomalies, namely, a broad transition at T1=5.6 K followed by a λ-anomaly at T2=5.4 K. A conservative estimate of the Sommerfeld coefficient of the electronic specific heat, γ=121mJK−2mol−1, indicates a moderately enhanced heavy-fermion ground state. A twin microstructure evolves in the family of planes spanned by the basal plane lattice vectors ao and co , with the magnetic hard axis bo common to all twins. The antiferromagnetic state is characterized by a strong ao, co easy-plane magnetic anisotropy where the ao direction is the easy axis in the easy plane. A spin-flop transition induced under magnetic field along the easy directions, results in complex magnetic phase diagrams. Taken together, our results reveal a high sensitivity of the magnetic and electronic properties of CePdAl3 to its structural modifications.
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001009389 7001_ $$0P:(DE-HGF)0$$aBauer, Andreas$$b1
001009389 7001_ $$0P:(DE-Juel1)165580$$aFranz, Christian$$b2
001009389 7001_ $$0P:(DE-HGF)0$$aSpallek, Jan$$b3
001009389 7001_ $$0P:(DE-HGF)0$$aSchönmann, Rudolf$$b4
001009389 7001_ $$0P:(DE-Juel1)194784$$aStekiel, Michal$$b5
001009389 7001_ $$0P:(DE-Juel1)156579$$aSchneidewind, Astrid$$b6
001009389 7001_ $$0P:(DE-HGF)0$$aWilde, Marc A.$$b7
001009389 7001_ $$00000-0001-7749-7965$$aPfleiderer, C.$$b8$$eLast author
001009389 773__ $$0PERI:(DE-600)3004165-X$$a10.1103/PhysRevResearch.5.023157$$gVol. 5, no. 2, p. 023157$$n2$$p023157$$tPhysical review research$$v5$$x2643-1564$$y2023
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