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Magnetic order in Pu2M3Si5 (M = Co, Ni).
Bauer, E D; Tobash, P H; Mitchell, J N; Kennison, J A; Ronning, F; Scott, B L; Thompson, J D.
Affiliation
  • Bauer ED; Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
J Phys Condens Matter ; 23(9): 094223, 2011 Mar 09.
Article in En | MEDLINE | ID: mdl-21339576
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.

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: J Phys Condens Matter Journal subject: BIOFISICA Year: 2011 Type: Article Affiliation country: United States

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: J Phys Condens Matter Journal subject: BIOFISICA Year: 2011 Type: Article Affiliation country: United States