Repozytorium publikacji - Politechnika Gdańska

We present the results obtained by superconducting quantum interference device (SQUID) magnetometry, specific heat, and Mossbauer spectroscopy measurements carried out on Np2Ni17 polycrystalline samples. We show that long-range magnetic order, with a moment mu((2b)) similar to 2.25 mu(B), occurs below T-N = 17.5 K on the Np (2b) sites. A nontrivial situation is observed in that the other Np sites (2d) do not take part to the order transition and carry only an induced moment of about 0.2 mu(B) below T-N. A combined analysis of the different experimental data sets allowed us to determine key parameters associated with the electronic structure of the system. The experimental results are discussed against first-principles electronic structure calculations based on the spin-polarized local spin density approximation plus Hubbard interaction.

Autorzy

• A. Hen,
• N. Magnani,
• J.-C. Griveau,
• R. Eloirdi,
• E. Colineau,
• J.-P. Sanchez,
• I. Halevy,
• Agnieszka Kozub link otwiera się w nowej karcie ,
• A. Shick,
• I. Orion,
• R. Caciuffo