The magnetization density in a UCu2P2single crystal

Autor:	Z. Zolnierek, R. Troć, A Delapalme, Dariusz Kaczorowski
Rok vydání:	1994
Předmět:	Magnetization Crystallography Unpaired electron Condensed matter physics Ferromagnetism Magnetic moment Chemistry Magnetic form factor Neutron diffraction Form factor (quantum field theory) Curie temperature General Materials Science Condensed Matter Physics
Zdroj:	Journal of Physics: Condensed Matter. 6:8877-8889
ISSN:	1361-648X 0953-8984
DOI:	10.1088/0953-8984/6/42/018
Popis:	Using polarized neutrons we have studied the magnetization density arising from unpaired electrons in the compound UCu2P2. This phosphide crystallizes in the hexagonal CaAl2Si2-type structure (P3m1) and is a ferromagnet with the highest Curie temperature (Tc=216 K) among all known 5f-electron compounds. Analysis of the experimentally derived form-factor function f(sin theta / lambda ) indicates an admixture of the 6d states with the 5f states due to the overlapping and covalency effects. In addition, we have found that this form factor is affected by the crystal-field effect occurring either for the U4+ or U3+ ion. In agreement with the molecular approach developed by Watson and Freeman to correlate covalency with magnetization density, we found a real occupation of the 6d states with the spatial symmetry of the U site, which explains an important anisotropy of the magnetic form factor at low values of sin theta / lambda .
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5340b5de6f13a1caeb1b12df47874155 https://doi.org/10.1088/0953-8984/6/42/018 Zobrazit plný text záznamu