Upper limit to magnetism in LaAlO3/SrTiO3 heterostructures
  Using polarized neutron reflectometry (PNR) we measured the neutron spin dependent reflectivity from four LaAlO3/SrTiO3 superlattices. This experiment implies that the upper limit for the magnetization induced by an 11 T magnetic field at 1.7 K is 2 emu/cm3. SQUID magnetometry of the superlattices sporadically finds an enhanced moment, possibly due to experimental artifacts. These observations set important restrictions on theories which imply a strongly enhanced magnetism at the interface between LaAlO3 and SrTiO3. 
M. R. Fitzsimmons,(1) N. Hengartner,(1) S. Singh,(1,2) M.   Zhernenkov,(1) F. Y. Bruno,(3) J. Santamaria,(3) A. Brinkman,(4)...
cond-mat.mtrl-sci