Photoelectron Spectroscopy Studies of Cr(001) Near-Surface Antiferromagnetism and Surface Ferromagnetism
L Klebanoff, W J. Robery, Guangyao Liu, D Shirley
Angle-resolved photoelectron spectroscopy (ARPES) studies of Cr(001) near-surface and surface electronic structure are reviewed. The near-surface energy band dispersions were investigated along the  direction parallel to the crystal surface. The periodicity of these band dispersions indicates that the valence electrons experience and self-consistently establish antiferromagnetism in the near-surface layers of Cr(001). Two surface-sensitive photoelectron peaks are observed in normal-emission ARPES. The spectral characteristics of thes surface related states are consistent with calculations that predict a ferromagnetic Cr(001) surface phase. The temperature dependence of one of these features is interpreted as evidence for a Cr(001) surface magnetic phase transition. An ARPES study of Cr(001) 3s core level is also reviewed. The relative intensities of the exchange-split photoelectron conponents change as the ARPES spectra become more surface sensitive. Surface contamination supresses this intensity variation and decreases the energy width of the 3s spectral profile. Almost all of the spectral observations are consistent with a surface-sentitive enhancement of the atomic 3d spin at the Cr(001) surface.
, Robery, W.
, Liu, G.
and Shirley, D.
Photoelectron Spectroscopy Studies of Cr(001) Near-Surface Antiferromagnetism and Surface Ferromagnetism, Springer Verlag, , [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=620268
(Accessed September 27, 2023)