Spin-density wave controlled by the superlattice period in Cr (001)/Sn multilayers with Sn monatomic spacer layers

Exotic spin-density-wave (SDW) states in Cr (001)/Sn multilayers were studied by neutron diffraction. Six multilayers with different Cr thicknesses (tCr=4, 8, 10, 12, 14 and 16 nm) with monatomic Sn layers were synthesized on MgO (001) substrates. In the multilayers, except for tCr=4 nm, complicated incommensurate SDW states formed at low temperatures, in which the wave vectors of the SDW were controlled by the multilayer period.