TY - JOUR
T1 - Thickness-dependent magnetic properties and strain-induced orbital magnetic moment in SrRuO3 thin films
AU - Ishigami, K.
AU - Yoshimatsu, K.
AU - Toyota, D.
AU - Takizawa, M.
AU - Yoshida, T.
AU - Shibata, G.
AU - Harano, T.
AU - Takahashi, Y.
AU - Kadono, T.
AU - Verma, V. K.
AU - Singh, V. R.
AU - Takeda, Y.
AU - Okane, T.
AU - Saitoh, Y.
AU - Yamagami, H.
AU - Koide, T.
AU - Oshima, M.
AU - Kumigashira, H.
AU - Fujimori, A.
N1 - Publisher Copyright:
© 2015 American Physical Society. ©2015 American Physical Society.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/8/3
Y1 - 2015/8/3
N2 - Thin films of the ferromagnetic metal SrRuO3 (SRO) show a varying easy magnetization axis depending on the epitaxial strain, and undergo a metal-to-insulator transition with decreasing film thickness. We have investigated the magnetic properties of SRO thin films with varying thicknesses fabricated on SrTiO3(001) substrates by soft x-ray magnetic circular dichroism at the Ru M2,3 edge. Results have shown that, with decreasing film thickness, the film changes from ferromagnetic to nonmagnetic at around 3 monolayer thickness, consistent with previous magnetization and magneto-optical Kerr effect measurements. The orbital magnetic moment perpendicular to the film was found to be ∼0.1μB/Ru, and remained nearly unchanged with decreasing film thickness while the spin magnetic moment decreases. A mechanism for the formation of the orbital magnetic moment is discussed based on the electronic structure of the compressively strained SRO film.
AB - Thin films of the ferromagnetic metal SrRuO3 (SRO) show a varying easy magnetization axis depending on the epitaxial strain, and undergo a metal-to-insulator transition with decreasing film thickness. We have investigated the magnetic properties of SRO thin films with varying thicknesses fabricated on SrTiO3(001) substrates by soft x-ray magnetic circular dichroism at the Ru M2,3 edge. Results have shown that, with decreasing film thickness, the film changes from ferromagnetic to nonmagnetic at around 3 monolayer thickness, consistent with previous magnetization and magneto-optical Kerr effect measurements. The orbital magnetic moment perpendicular to the film was found to be ∼0.1μB/Ru, and remained nearly unchanged with decreasing film thickness while the spin magnetic moment decreases. A mechanism for the formation of the orbital magnetic moment is discussed based on the electronic structure of the compressively strained SRO film.
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U2 - 10.1103/PhysRevB.92.064402
DO - 10.1103/PhysRevB.92.064402
M3 - Article
AN - SCOPUS:84939825314
VL - 92
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 6
M1 - 064402
ER -