  In the search of material properties out-of-equilibrium, the non-equilibrium
steady states induced by electric current are an appealing research direction
where unconventional states may emerge. However, the unavoidable Joule heating
caused by flowing current calls for the development of new measurement
protocols, with a particular attention to the physical properties of the
background materials involved. Here, we demonstrate that localised heating can
give rise to a large, spurious diamagnetic-like signal. This occurs due to the
local reduction of the background magnetisation caused by the heated sample,
provided that the background material has a Curie-like susceptibility. Our
experimental results, along with numerical calculations, constitute an
important building block for performing accurate magnetic measurements under
the flow of electric current.
