Lithium fluoride (LiF) doping of aluminum electrodes is used in organic electronics. As a result of the chemical reaction between LiF and aluminum, the contact resistance is reduced due to the formation of a dipolar layer that shifts the vacuum level of the organic semiconductors (OS). Some works have extended the use of LiF to ferromagnetic (FM) electrodes for its use in organic spintronics. However, we have found some anomalous magneto-conductance behavior in LiF-treated devices. These anomalies could be due to the formation of fluorides of the FM materials having antiferromagnetic properties. Polarized neutron reflectometry measurements will allow us to determine the existence of such layers.