English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

International audienceThe R.E. oxynitrides Eu2+1-x Ln3+x O1-xNx (Ln3+=Nd3+, Eu3+, Gd3+) with the NaCl type structure have been prepared. The homogeneity range of the oxygen rich system is the following : 0 ≤ x ≤ 0.26 at 1250°C with Nd3+, 0 ≤ x ≤ 0.30 at 1200°C with Eu3+ and 0 ≤ x ≤ 0.26 at 1850°C with Gd3+. Lattice parameters, magnetic and electrical measurements have been carried out both as a function of x and temperature. The oxynitrides Eu2+1-x Nd3+x O1-xNx have a ferrimagnetic behaviour with antiparallel orientation of the neodymium and europium moments. A semiconductring metal transition appears for x ≈ 0.22 ; it is explained by the crossing of the Eu2+ : 4f7 levels and the 5dt2g -6s conduction band since the magnetic measurements show clearly the presence of Eu3+ ions for x ≈ 0.22. In the semiconducting range (x<0.22) the Curie temperature Tc increases and the activation energy ƊE decreases with increasing x. The oxygen-rich oxynitrides Eu21-x+Ln3x+ O1-xNx (Ln3+=Eu3+, Gd3+) are ferromagnetic semiconducting compounds for which Tc is greater than that of EuO ; ƊE decreases as x increases. The first Mössbauer resonance measurements in the Eu21-x+Eu2xO1-xNx system indicate two distinct Mössbauer lines for Eu2+ and Eu3+ at 300k. The electrical properties are discussed on the basis of a qualitative energy diagram deduced from those of the R.E. monochalcogenides. These properties are compared with those of EuO under pressure

le journal de physique colloques

NEW MAGNETIC SEMICONDUCTING COMPOUNDS : THE RARE EARTH OXYNITRIDES Eu2+1-x Ln3+xO1-xNx (Ln3+ = Nd3+, Eu3+, Gd3+)