2008
DOI: 10.1088/0953-8984/20/28/285228
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Magnetic field dependent magnetization of a conducting plasticized poly(aniline) film

Abstract: We report magnetic data of free standing films of poly(aniline) (PANI) protonated with a plasticizing di-ester of succinic acid. The data have been obtained using the electron spin resonance (ESR) technique at two different frequencies, X-band (9.4 GHz) and Q-band (34 GHz), on one hand, and by magnetization measurements in broad ranges of temperatures and magnetic fields on the other hand. All the data can be explained assuming a transition as a function of temperature from delocalized magnetic moments in the … Show more

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Cited by 10 publications
(12 citation statements)
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“…In the text below, we will analyze the results obtained in Ref. 8 and show that this conclusion is incorrect.…”
mentioning
confidence: 97%
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“…In the text below, we will analyze the results obtained in Ref. 8 and show that this conclusion is incorrect.…”
mentioning
confidence: 97%
“…8 It was concluded that the field dependence of the magnetization of polyaniline at T = 2 K is described by the Brillouin function for the spin S = 1/2. In the text below, we will analyze the results obtained in Ref.…”
mentioning
confidence: 99%
“…These conclusion have been previously obtained based on magnetization and ESR data in partially reduced poly͑3-methythiophene͒ pellets 3 and doped plasticized polyaniline films. 4 The interesting thing about our data is that the fitting of the ESR data for sample 2 with two Dysonian lines enables us to follow the behavior of the microwave conductivity as a function of temperature in each phase of the sample. This separation is obtained in a contactless measurement.…”
Section: Discussionmentioning
confidence: 99%
“…We have concluded that our magnetization and electron spin resonance ͑ESR͒ data in conducting polymer pellets could be explained assuming ferromagnetic ͑FM͒ and antiferromagnetic ͑AFM͒ interacting spin polarons. The observation of AFM correlated polarons in doped plasticized polyaniline films 4 allowed us to propose a more general scenario for the polaronic interaction in conducting polymers. We have suggested that small crystalline portions with FM coupling are surrounded by disordered polymers with AFM interaction.…”
Section: Introductionmentioning
confidence: 99%
“…The authors of paper (Djurado et al, 2008) were sure that the "metallic" model is true, and simulated the field dependence for polyaniline by the Brillouin function with S=1/2, but they were forced to increase the Bohr magneton by a factor of 1.5. If do not make this strange increase of the universal constant, the field dependence is simulated with S=1.15.…”
Section: Analysis Of Field Dependences Of Magnetization Of Polyanilinmentioning
confidence: 99%