Physical Review Letters
Thin Pt films on an yttrium iron garnet (YIG=Y3Fe5O12) show ferromagneticlike transport properties, which may impact the functionality of Pt in spin current detection, but do not provide direct quantitative information on the Pt magnetization. We report magnetic x-ray magnetic circular dichroism measurements of YIG/Pt(1.5 nm) showing an average Pt moment of 0.054 μB at 300 K and 0.076 μB at 20 K. This observation indicates strong proximity effects and induced magnetic ordering in Pt on magnetic insulators and their contribution to the spin-related measurements should not be neglected. The transport characteristics also suggest considerable modifications in the Pt electronic structure due to magnetic ordering.
© 2013 by the American Physical Society. The publisher's version of the article can be found at http://prl.aps.org/abstract/PRL/v110/i14/e147207.
Y. M. Lu et al., Phys. Rev. Lett. 110, 147207 (2013).