AI Article Synopsis
- This study presents the physical properties of two new plutonium compounds, Pu2M3Si5 (with M being Co or Ni), focusing on their magnetic susceptibility, specific heat, and electrical resistivity.
- The crystal structures of the compounds differ: Pu2Ni3Si5 has an orthorhombic structure and exhibits ferromagnetic ordering above 65 K, transitioning to an antiferromagnetic state below 35 K, while Pu2Co3Si5 adopts a monoclinic structure with two magnetic transitions at 38 K and 5 K.
- Both compounds show a notable enhancement in the Sommerfeld coefficient (γ ∼ 100 mJ/mol Pu K²) in their magnetic
Article Abstract
The physical properties including magnetic susceptibility, specific heat, and electrical resistivity of two new plutonium compounds Pu2M3Si5 (M = Co, Ni) are reported. Pu2Ni3Si5 crystallizes in the orthorhombic U2Co3Si5 structure type, which can be considered a variant of the BaAl4 tetragonal structure, while Pu2Co3Si5 adopts the closely related monoclinic Lu2Co3Si5 type. Magnetic order is observed in both compounds, with Pu2Ni3Si5 ordering ferromagnetically at T(C) = 65 K then undergoing a transition into an antiferromagnetic state below T(N) = 35 K. Two successive magnetic transitions are also observed at T(mag1) = 38 K and T(mag2) = 5 K in Pu2Co3Si5. Specific heat measurements reveal that these two materials have a moderately enhanced Sommerfeld coefficient γ ∼ 100 mJ/mol Pu K(2) in the magnetic state with comparable RKKY and Kondo energy scales.
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| http://dx.doi.org/10.1088/0953-8984/23/9/094223 | DOI Listing |
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