Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12   bilayers
  Using X-ray magnetic circular dichroism (XMCD) measurements, we explore the possible existence of induced magnetic moments in thin Pt films deposited onto the ferrimagnetic insulator yttrium iron garnet (Y3Fe5O12). Such a magnetic proximity effect is well established for Pt/ferromagnetic metal heterostructures. Indeed, we observe a clear XMCD signal at the Pt L3 edge in Pt/Fe bilayers, while no such signal can be discerned in XMCD traces of Pt/Y3Fe5O12 bilayers. Integrating the XMCD signals allows to estimate an upper limit for the induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers. 
Stephan Gepr\"ags, Sibylle Meyer, Stephan Altmannshofer, Matthias   Opel, Fabrice Wilhelm, Andrei Rogalev, Rudolf Gross, Seb...
cond-mat.mtrl-sci cond-mat.mes-hall