https://doi.org/10.1007/s100510050679
High spin state of Mn in an ideal monolayer on Ag(001)
1
Laboratoire de Physique et de Spectroscopie Électronique (UPRES A -CNRS 7014) ,
Faculté des Sciences et Techniques, 4 rue des Frères Lumière,
68093 Mulhouse Cedex, France
2
Laboratoire pour l'Utilisation du Rayonnement Électromagnétique,
Bâtiment 209 D,
Centre Universitaire Paris-Sud,
91405 Orsay Cedex, France, and LPMS, Université de Cergy-Pontoise, Neuville-sur-Oise,
95031 Cergy-Pontoise, France
Received:
4
May
1998
Published online: 15 March 1999
We studied the magnetic properties of ultra-thin Mn films deposited
on Ag (001) held at 80 K with soft X-ray absorption and magnetic
circular dichroism. The observed shape and branching ratio of
the Mn 2p absorption edge as a function of Mn coverage demonstrate
that, up to 
, the Mn adopts a stable high spin state
similar to the Mn atom Hund's rule 
ground state. Above
this coverage a rapid transition from localized high spin to
itinerant low spin behavior of the Mn 3d electrons is evidenced.
Magnetic circular dichroism shows no sign of long range ferromagnetic
order in these films at 80 K. The data, first confirm the large
atomic-like local magnetic moment, and second are in line with
the in-plane 
antiferromagnetic order, reported recently
(Phys. Rev. B 57, 1141 (1998)), for Mn in the nearly ideal on-top Mn
monolayer formed by 0.9 ML deposited at 80 K.
PACS: 75.70.Ak – Magnetic properties of monolayers and thin films / 78.70.Dm – X-ray absorption spectra / 78.20.Ls – Magnetooptical effects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
