Theory of ferromagnetism in CeCo(5)
Electronic structure calculations for CeCo(5) in the hexagonal CaCu(5) structure and for the isostructural compounds YCo(5) and LaCo(5) are reported. It is shown that the anomalous properties of CeCo(5), in particular its reduced magnetic moment relative to YCo(5) and LaCo(5), may be due to itinerant 4f states. An important concept in the electronic structure of CeCo(5) is the hybridisation between the 3d states of cobalt and the 4f states of cerium. With spin-orbit coupling included in the calculation, good agreement with experiments for the total magnetic moment is achieved. A non-negligible 4f magnetic moment composed of both spin and orbital contributions is found on the cerium site. This suggests the existence of itinerant 4f magnetism in this compound. Common to all three compounds are the quite large orbital moments on the cobalt sites.
Bibliographic Reference: Article: Physical Review B, Vol. 41 (1990) No. 13, pp. 9111-9120
Record Number: 199011872 / Last updated on: 1994-12-02
Original language: en
Available languages: en