Trivalent americium has a non-magnetic (J = 0) ground state arising from the cancelation of the orbital and spin moments. However, magnetism can be induced by a large molecular field if Am3+ is embedded in a ferromagnetic matrix. Using the technique of x-ray magnetic circular dichroism, we show that this is the case in AmFe2. Since Jz = 0, the spin component is exactly twice as large
as the orbital one, the total Am moment is opposite to that of Fe, and the magnetic dipole operator Tz can be determined directly; we discuss the progression of the latter across the actinide series.
MAGNANI Nicola;
CACIUFFO Roberto;
WILHELM F.;
COLINEAU Eric;
ELOIRDI Rachel;
GRIVEAU Jean-Christophe;
RUSZ J.;
OPPENEER P. M.;
ROGALEV A.;
LANDER G.H.;
2015-03-18
AMER PHYSICAL SOC
JRC93632
0031-9007,
https://journals.aps.org/authenticate?rt=/prl/abstract/10.1103/PhysRevLett.114.097203,
https://publications.jrc.ec.europa.eu/repository/handle/JRC93632,
10.1103/PhysRevLett.114.097203,
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