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The induced magnetisation density in a single crystal of the heavy fermion material UPd(2)Al(3) has been measured at T = 36 K (above the antiferromagnetic ordering temperature of 14 K). A magnetic field of 5 T was applied along the easy axis of magnetisation. The magnetisation density as measured by the polarised-neutron technique was associated totally with the uranium atom; no spin transfer was found on the Pd atoms. The induced moment, as measured by neutrons, was some 12 % below that measured by magnetisation on the same crystal. This indicates the presence of a significant positive (with respect to the uranium moment) conduction electron polarisation. The ratio of the orbital to the spin moment of uranium found experimentally is -2.01(25), compared with the free-ion values of -2.56 (for U(3+)) and -3.29 (for U(4+)), and a recent theoretical prediction of -1.35.

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Authors: KOMATSUBARA T, Tohoku University, Department of Physics (JP);PAOLASINI L, CEA, CEN Grenoble (FR);PAIXAO J A, JRC Karlsruhe (DE);LANDER G H, JRC Karlsruhe (DE);DELAPALME A, CEA, CEN Saclay, Gif-sur-Yvette (FR);SATO N, Tohoku University, Department of Physics (JP)
Bibliographic Reference: Article: Journal of Physics, Condensed Matter, Vol. 5 (1993) pp. 8905-8910
Record Number: 199311628 / Last updated on: 1994-11-28
Original language: en
Available languages: en