Abstract
Performing high-field and high-frequency electron paramagnetic resonance (HFHFEPR) experiments on a one-dimensional (1-D) magnetic system, we put in evidence a number of effects that can be attributed to extrinsic properties of the sample and have to be distinguished from the intrinsic physical properties of the investigated system. We have studied a 1-D molecular-based magnetic system made up by trivalent gadolinium ions (Gd3+) and the nitronyl-nitroxide radicals (NIT-Et = 2-ethyl-4,4,5,5,-tetramethyl-4,5-dihydro-1-H-imidazolyl-1-oxyl-3-oxide). In addition to showing the effects of short-range magnetic correlation on HFHFEPR spectra of this compound, this paper is also intended to be a starting point of an investigation of the methods according to which HFHFEPR spectra should be performed in order to estimate the importance, minimize and possibly correct the effects of orientation, propagation and demagnetization phenomena when dealing with magnetic materials.
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