Muon studies of conducting polymers

Pratt, F. L.; Hayes, W.; Mitchell, Geoffrey R.; Rossi, B.; Kiani, Masoumeh; Malhotra, Bansi D.; Pandey, Shyam S.; Milton, A.; Monkman, Andrew P.

doi:10.1016/0379-6779(93)91011-p

Cited by 19 publications

(14 citation statements)

References 9 publications

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“…In the earlier muon studies of conducting polymers [13][14][15], spectral density functions from NMR theory were adapted to the muon analysis, resulting in the muon spin relaxation being fitted to an exponential decay function. Risch and Kehr (RK) [16] pointed out that the standard NMR theory used for this data analysis is not strictly valid, as it assumes the existence of a finite correlation time that is short compared to all other time scales in the problem.…”

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confidence: 99%

Intrinsic Mobility Limit for Anisotropic Electron Transport inAlq3

et al. 2008

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Muon spin relaxation has been used to probe the charge carrier motion in the molecular conductor Alq3 (tris[8-hydroxy-quinoline] aluminum). At 290 K, the magnetic field dependence of the muon spin relaxation corresponds to that expected for highly anisotropic intermolecular electron hopping. Intermolecular mobility in the fast hopping direction has been found to be 0.23+/-0.03 cm2 V-1 s(-1) in the absence of an electric- field gradient, increasing to 0.32+/-0.06 cm2 V-1 s(-1) in an electric field gradient of 1 MV m(-1). These intrinsic mobility values provide an estimate of the upper limit for mobility achievable in bulk material.

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confidence: 99%

Intrinsic Mobility Limit for Anisotropic Electron Transport inAlq3

et al. 2008

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“…These are typically doped conjugated polymers whieh combine flexibility and processibility with very high conductivities. Muon experiments are used in studying the spin dynamics of injected defects in polymer chains [23][24][25][26]. The muon implants as muonium and can attack a double bond, thereby attaching the muon to the polymer chain but introducing a mobile excitation into the chain [24].…”

Section: Conducting Polymersmentioning

confidence: 99%

“…Muon experiments are used in studying the spin dynamics of injected defects in polymer chains [23][24][25][26]. The muon implants as muonium and can attack a double bond, thereby attaching the muon to the polymer chain but introducing a mobile excitation into the chain [24]. The field-dependenee of the muon spin relaxation can be related to the power spectrum of the fluctuating field at the muon site and hence to the dimensionality of the random walk of the injected excitation.…”

Section: Conducting Polymersmentioning

confidence: 99%

Muon studies of organic ferromagnets and conductors

Blundell

1997

Appl. Magn. Reson.

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Abstraet. Muon spin rotation (~tSR) experiments can be especially helpful in the study of various organic molecular materials. The technique has been used to study the magnetization in nitronyl nitroxide organic ferromagnets, the spin-density-wave ground state in various charge transfer salts, the dynamics of carriers in organic eonductors and the vortex structures in organic superconductors. I outline the motivation for studying these new materials and review and discuss the results of recent work.

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“…1019 cc; Scott et al 1983). The longitudinal relaxation of implanted muons in undoped polypyrrole at both 15 and 300 K in a range of magnetic fields has been studied by Pratt et al (1993) and is shown in figure 6a, 6. Deuterated samples give similar results and we conclude that relaxation is dominated by electronic spins.…”

Section: N Te R a C Tio N O F M U O N S W Ith P O Ly M E R Ch A In Smentioning

confidence: 99%

“…Results of longitudinal polarization measurements on PPG obtained by Pratt et al (1993) are shown in figure 8a, 6. About 45% of the muons are in diamagnetic states and the remainder are present as paramagnetic radical with a hyperfine interaction comparable to that found for polyacetylene ( § 3 a) and polypyrrole ( §3 6).…”

Section: N Te R a C Tio N O F M U O N S W Ith P O Ly M E R Ch A In Smentioning

confidence: 99%

Muon studies in organic conductors

Hayes

1995

Phil. Trans. R. Soc. Lond. A

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This paper contains a brief review of muon studies of organic conductors with emphasis on polymers. The species created by implanted muons in both semiconducting polymers and polymers doped to metallic values of conductivity are described. Both diamagnetic centres and paramagnetic radicals are formed in the semiconducting materials. The mechanisms of interaction of the muon with the polymers and the longitudinal relaxation of the muon species are discussed. In highly conducting polymers the muons are primarily present in diamagnetic states. Implanted muons have also been used to study both organic chargetransfer salts and Rb 3 C 60 in the superconducting state.

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Muon studies of conducting polymers

Cited by 19 publications

References 9 publications

Intrinsic Mobility Limit for Anisotropic Electron Transport inAlq3

Intrinsic Mobility Limit for Anisotropic Electron Transport inAlq3

Muon studies of organic ferromagnets and conductors

Muon studies in organic conductors

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