Pfandzelter, R.Steierl, G.Rau, C.2015-04-302015-04-301995Pfandzelter, R., Steierl, G. and Rau, C.. "Evidence for 4d Ferromagnetism in 2D Systems: Ru Monolayers on C(0001) Substrates." <i>Physical Review Letters,</i> 74, no. 17 (1995) American Physical Society: 3467. http://dx.doi.org/10.1103/PhysRevLett.74.3467.https://hdl.handle.net/1911/79698The first observation of 4d ferromagnetism in two-dimensional systems is reported. Using Auger electron spectroscopy, we find that the initial growth of Ru on a C(0001) substrate is lateral until a homogeneous monolayer film is formed. The magnetic properties of the films are studied using spin polarized secondary electron spectroscopy. For one monolayer Ru on C(0001), below a surface Curie temperature of approximately 250 K, nonzero in-plane spin polarization is observed and found to saturate in an applied field of a few tenths of an Oe. The results are discussed in the light of theoretical predictions.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1103/PhysRevLett.74.3467