Magnetic and electronic properties of NpCo.sub.2./sub.: Evidence for long-range magnetic order

0421652 - FZÚ 2014 RIV US eng J - Článek v odborném periodiku
Sanchez, J.-P. - Griveau, J.C. - Javorský, P. - Colineau, E. - Eloirdi, R. - Boulet, P. - Rebizant, J. - Wastin, F. - Shick, Alexander - Caciuffo, R.
Magnetic and electronic properties of NpCo₂: Evidence for long-range magnetic order.
Physical Review. B. Roč. 87, č. 13 (2013), "134410-1"-"134410-7". ISSN 1098-0121
Institucionální podpora: RVO:68378271
Klíčová slova: magnetic properties * electronic structure
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 3.664, rok: 2013
http://link.aps.org/doi/10.1103/PhysRevB.87.134410

The magnetic and electronic properties of the cubic Laves phase intermetallic compound NpCo2 have been investigated by magnetization, specific heat, and electrical resistivity measurements. Magnetization data confirm previous results, i.e., an antiferromagneticlike order at 12.5 K and a metamagnetic transition at Bm ~ 4.3 T at 3 K with a saturation moment of ~0.6 μB. The electronic structure of NpCo2 was examined theoretically and compared to experimental data. Local spin density approximation (LSDA) calculations show that this material is close to a magnetic instability and that ferromagnetic alignment of the Np moments is the most stable. LSDA+U calculations in the fully localized limit with U = 0 give reasonable agreement with the experimental Np moment value and their orbital and spin contributions.
Trvalý link: http://hdl.handle.net/11104/0227945