Magnetization density distribution in U2Co2Sn

J A Paixao, L C J Pereira, Pedro Estrela, M Godinho, M Almeida, L Paolasini, M Bonnet, J Rebizant, J C Spirlet

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A magnetization density study by means of polarized-neutron scattering on the intermetallic compound UzCo2Sn is reported. U2Co2Sn belongs to the large An(2)T(2)X (An = U, Np, Pu, Am; T = transition metal; X = In, Sn) family of compounds crystallizing in an ordered variant of the tetragonal U3Si2 type of structure (space group P4/mbm). U2Co2Sn does not order magnetically but has a large magnetic susceptibility that qualifies it as an enhanced paramagnet or spin fluctuator. We report single-crystal magnetization measurements that show a significant magnetic anisotropy, with a c-axis susceptibility exceeding that measured on the basal plane by a factor of four. The magnetization density distribution in the unit cell was measured at 2 K by polarized-neutron scattering under a magnetic field of 5.5 T applied parallel to the c-axis. It was found that the major contribution to the magnetic susceptibility is located on the U atoms (mu(U) = 118(3) m mu(B)) but a small response from the Co atoms is also measured (mu(Co) = 13(2) m mu(B)).
Original languageEnglish
Pages (from-to)2115-2125
Number of pages11
JournalJournal of Physics-Condensed Matter
Issue number9
Publication statusPublished - 1999


Cite this

Paixao, J. A., Pereira, L. C. J., Estrela, P., Godinho, M., Almeida, M., Paolasini, L., ... Spirlet, J. C. (1999). Magnetization density distribution in U2Co2Sn. Journal of Physics-Condensed Matter, 11(9), 2115-2125.