I get like a bazillion hits on this topic. Unfortunately there isn't a direct strong statement. The magnetism is often incidental. Graphene is a generally good carrier material.
Thank you. I will note the following: 1. graphene can be a carrier for magnetite, and so the composite would have some magnetic properties in that, in a field, the graphene could moved by the magnetite it contains as a cage. 2. The presence of magnetite however does not alter the electronic atomic properties of the carbon (magnetism effects in matter depend mostly on how the outer shell electrons are bound). It gets more complicated when we start to consider moving positive charge (protons); in an atom the magnetic effects of positive and negative charge tend to cancel out as far as magnetomotor forces are concerned. Otherwise everything would be magnetic)
Ah - on rereading the paper it seems like the presence of the magnetite probably alters the outer electrons on the oxygen in the graphene oxide. That might make the system more magnetic. And i nth lab preparation they used permanent magnets to easily separate out the GO-magnetite.
I get like a bazillion hits on this topic. Unfortunately there isn't a direct strong statement. The magnetism is often incidental. Graphene is a generally good carrier material.
https://pubs.rsc.org/en/content/articlelanding/2012/ra/c2ra20885g#!divAbstract
Thank you. I will note the following: 1. graphene can be a carrier for magnetite, and so the composite would have some magnetic properties in that, in a field, the graphene could moved by the magnetite it contains as a cage. 2. The presence of magnetite however does not alter the electronic atomic properties of the carbon (magnetism effects in matter depend mostly on how the outer shell electrons are bound). It gets more complicated when we start to consider moving positive charge (protons); in an atom the magnetic effects of positive and negative charge tend to cancel out as far as magnetomotor forces are concerned. Otherwise everything would be magnetic) Ah - on rereading the paper it seems like the presence of the magnetite probably alters the outer electrons on the oxygen in the graphene oxide. That might make the system more magnetic. And i nth lab preparation they used permanent magnets to easily separate out the GO-magnetite.