REVISITED MAGNETIC-PROPERTIES OF NPAL3 - COMPARISON WITH OTHER CUBIC AUCU3-TYPE ACTINIDE COMPOUNDS

Authors
ODDOU JL ARONS RR BLAISE A BURLET P COLINEAU E JEANDEY C RESSOUCHE E SANCHEZ JP LARROQUE J REBIZANT J SPIRLET JC
Citation
Jl. Oddou et al., REVISITED MAGNETIC-PROPERTIES OF NPAL3 - COMPARISON WITH OTHER CUBIC AUCU3-TYPE ACTINIDE COMPOUNDS, Journal of magnetism and magnetic materials, 135(2), 1994, pp. 183-190
Citations number
22
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
135
Issue
2
Year of publication
1994
Pages
183 - 190
Database
ISI
SICI code
0304-8853(1994)135:2<183:RMON-C>2.0.ZU;2-1
Abstract
The magnetic properties of polycrystalline samples of NpAl3, having th e cubic AuCu3-type structure, have been re-examined by neutron diffrac tion and Np-237 Mossbauer measurements. They show that, contrary to ea rlier data (ferromagnetic order at 62.5 K), NpAl3 orders at T(N) congr uent-to 37 K with a type II AF structure and a saturation Np moment of about 1.3 mu(B). The ordered moment as well as the induced quadrupola r interaction are close to the values expected for a GAMMA5 crystal fi eld ground state of the Np3+ ions. Comparisons are made with the magne tic behaviour of the AnX3 (An = U, Np) compounds.