title: X-ray magnetic circular dichroism measurements in Ni up to 200 GPa: resistant ferromagnetism.
abstract: The structural stability of fcc Ni over a very large pressure range offers a unique opportunity to experimentally investigate how magnetism is modified by simple compression. K-edge x-ray magnetic circular dichroism (XMCD) shows that fcc Ni is ferromagnetic up to 200 GPa, contradicting recent predictions of an abrupt transition to a paramagnetic state at 160 GPa. Density functional theory calculations point out that the pressure evolution of the K-edge XMCD closely follows that of the p projected orbital moment rather than that of the total spin moment. The disappearance of magnetism in Ni is predicted to occur above 400 GPa.
authors.affiliation: European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP220, 38043 Grenoble Cedex, France.
authors.forename: R
authors.initials: R
authors.lastname: Torchio
authors.forename: Y O
authors.initials: YO
authors.lastname: Kvashnin
authors.forename: S
authors.initials: S
authors.lastname: Pascarelli
authors.forename: O
authors.initials: O
authors.lastname: Mathon
authors.forename: C
authors.initials: C
authors.lastname: Marini
authors.forename: L
authors.initials: L
authors.lastname: Genovese
authors.forename: P
authors.initials: P
authors.lastname: Bruno
authors.forename: G
authors.initials: G
authors.lastname: Garbarino
authors.forename: A
authors.initials: A
authors.lastname: Dewaele
authors.forename: F
authors.initials: F
authors.lastname: Occelli
authors.forename: P
authors.initials: P
authors.lastname: Loubeyre