Yu. Khaydukov, Roman Morari, D. Lenk, V. Zdravkov, D. G. Merkel, B.-K. Seidlhofer, C. Miiller, Hans-Albrecht Krug von Nidda, T. Keller, R. Steitz, A. Sidorenko, Siegfried R. Horn, R. Tidecks, B. Keimer
- We report results of a magnetic characterization of [Cu30Ni70(6nm)/Nb(x)]20(x=1÷7nm) superlattices using Polarized Neutron Reflectometry (PNR) and SQUID magnetometry. The study has shown that the magnetic moment of the structures growths almost linearly from H = 0 to Hsat = 1.3kOe which can be interpreted as evidence of antiferromagnetic (AF) coupling of the magnetic moments in neighbouring layers. PNR, however, did not detect any in-plane AF coupling. Taking into account the out-of-plane easy axis of the Cu30Ni70 layers, this may mean that only the out-of-plane components of the magnetic moments are AF coupled.
