Organic material usable in a magnetometer and probe for an electron paramagnetic resonance (EPR) magnetometer using said material

Abstract

The invention relates to an organic material (5) usable in an electron paramagnetic resonance (EPR) magnetometer, as well as to a probe (3) using said material. The object of the invention is to provide a material simultaneously having a limited line width (EPR), good temperature characteristics and which does not react in the presence of water. This object is achieved with the aid of a radical cation salt of formula (Ar).sub.2..sup.+ X.sup.- in which Ar represents an aromatic hydrocarbon, which is either unsubstituted or substituted by at least one element chosen from within the group constituted by halogen atoms or alkyl and alkoxy radicals and X.sup.- is an anion chosen from among TeOF.sub.5.sup.- or SeOF.sub.5.sup.-.

Dependencies are inferred from the claim text.