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        ISSN 2086-5325 7 April 2004  
 
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  Arsip publikasi :

Magnetic Neutron Diffraction of Uranium Intermetallics

Agus Purwanto

Puslitbang IPTEK Bahan, BATAN, Kompleks Puspiptek Serpong, Tangerang 15310

Abstrak

Several isostructural families of uranium intermetallic compounds UTX, U2T2X and UT2X2 (T and X are transition metal and p electron elements, respectively) with orthohombic, hexagonal and cubic asymmetry have been investigated using unpolarized magnetic neutron diffraction at Los Alamos, Argonne and Chalk River National Laboratories. The aim has been to understand the role of hybridization, in relation to magnetocrystalline anisotropy and moment reduction, as compared to the moment of the free ion obtained by Hund's rule. Representation theory, as well as magnitude (Shubnikov) space group analysis, has been used extensively to generate all possible magnetic structure allowed by symmetry. The refinements were done using both standard crystallographyc packages and specially-written FORTRAN codes. The magnetic structure obtained range from a simple collinear-commensurate configuration in UCu1.5Sn2 to a noncollinear-incommensurate configuration with two domains in UNiGe. The result is that hybridization plays an important role in determining both magnetic anisotropy and moment reduction.

Publikasi : Disertasi S3 (1995)
Tanggal masuk / revisi : 7 April 2004 / 7 April 2004
Naskah lengkap : format PDF (2.196.625 byte)
Kontak : Agus Purwanto
Keterangan : fisika terapan
231 halaman
bahasa Inggris
S3 New mexico State University

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