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A novel vertical hysteresis loop shift is observed for a bilayer thin film ofNi80Fe20/SrRuO3 (1:2 thickness ratio) on SrTiO3 substrate, after field cooledthrough the Curie temperature ~125 K of SrRuO3, whereas no shift is found forzero field cooled measurement. The vertical shift is noticed below ~125 K whichincreases with decreasing temperature and reaches a maximum of 33% at 2 K. Thevertical shift is modelled closely using micromagnetic simulations. It is shownthat the amount of vertical shift depends on the competition between therelative thicknesses and the anisotropies of the two films governed by SpringThickness law and Imperial Law, respectively. We propose a generalized model ofvertical shift which is applicable for other material systems, and hence couldbe informative for use of vertical shift in future spintronic devices.

Tuneable vertical hysteresis loop shift in Ni80Fe20/SrRuO3 heterostructures