Susceptibilities magnetiques des mononitrures et sesquicarbures de thorium, uranium et plutonium

First principles study on elastic properties and phase transition of NpN

“…With the AFM and AFM-SOC states the type-I configuration was adapted because it has been reported that UN is an AFM state below 52 K [16] and has a type-I AFM configuration, as determined using a neutron diffraction measurement [17]. The total energies and energy differences relative to the ground state are listed in Table 1.…”

“…The AFM type-I configuration was adapted for the magnetic state of PuN because it was reported that PuN is an AFM state below 13 K [16]. The SOC effect was also taken into account in the of UN and PuN calculations.…”

Photoelectron spectroscopy study of PuN

“…Magnetic susceptibility (T) exhibits Curie-Weiss behavior yielding an effective moment e f f ϭ1.08 B /Pu. 4 Antiferromagnetic ordering at T N ϭ13 K was suggested on the basis of a maximum in (T) and specific heat. 5 However, the entropy associated with the transition is rather low and no sign of magnetic order was found by neutron diffraction, excluding ordered moments larger than 0.25 B /Pu.…”

Magnetic Susceptibility of UC1-xNxfrom 4° to 1,100°K

“…More recently, Adachi & Imoto'e8' also have presented an explanation for the experimental magnetic constants such as TN, 8, and for the exchange interaction magnetic coefficients JI and Jz of antiferromagnetic NaCl type compounds with group V, making use of the RKKY theory. In this article, they did not adopt integers but fractions for the number of 5f electrons on the basis of the band concept of NaCl type uranium compounds calculated by them.…”