TY - JOUR
T1 - Thickness-dependent appearance of ferromagnetism in Pd(100) ultrathin films
AU - Sakuragi, S.
AU - Sakai, T.
AU - Urata, S.
AU - Aihara, S.
AU - Shinto, A.
AU - Kageshima, H.
AU - Sawada, M.
AU - Namatame, H.
AU - Taniguchi, M.
AU - Sato, T.
PY - 2014/8/18
Y1 - 2014/8/18
N2 - We report the appearance of ferromagnetism in thin films of Pd(100), which depends on film thickness in the range of 3-5 nm on SrTiO3(100) substrates. X-ray magnetic circular dichroism measurement shows the intrinsic nature of ferromagnetism in Pd(100) films. The spontaneous magnetization in Pd(100) films, corresponding to is 0.61μB/atom, is comparable to Ni, and it changes in an oscillatory manner depending on film thickness, where the period quantitatively agrees with the theoretical prediction based on the two-dimensional quantum well in the film. This indicates that the discrete electronic states in the quantum well shift to Fermi energy to satisfy the condition for ferromagnetism (Stoner criterion) at a specific film thickness.
AB - We report the appearance of ferromagnetism in thin films of Pd(100), which depends on film thickness in the range of 3-5 nm on SrTiO3(100) substrates. X-ray magnetic circular dichroism measurement shows the intrinsic nature of ferromagnetism in Pd(100) films. The spontaneous magnetization in Pd(100) films, corresponding to is 0.61μB/atom, is comparable to Ni, and it changes in an oscillatory manner depending on film thickness, where the period quantitatively agrees with the theoretical prediction based on the two-dimensional quantum well in the film. This indicates that the discrete electronic states in the quantum well shift to Fermi energy to satisfy the condition for ferromagnetism (Stoner criterion) at a specific film thickness.
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U2 - 10.1103/PhysRevB.90.054411
DO - 10.1103/PhysRevB.90.054411
M3 - Article
AN - SCOPUS:84940266017
SN - 1098-0121
VL - 90
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 5
M1 - 054411
ER -