Spin fluctuations in the spin-Peierls compound MEM(TCNQ)2 studied using muon spin relaxation

Brendon W Lovett; S J Blundell; F L Pratt; T Jestädt; W  Hayes; S  Tagaki; M  Kurmoo

doi:10.1103/PhysRevB.61.12241

Spin fluctuations in the spin-Peierls compound MEM(TCNQ)₂ studied using muon spin relaxation

Brendon W Lovett, S J Blundell, F L Pratt, T Jestädt, W Hayes, S Tagaki, M Kurmoo

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Abstract

We report a muon spin relaxation (mu SR) investigation of the organic spin-Peierls compound MEM(TCNQ)(2) at temperatures down to 39 mK. We have observed a slowing down of the electronic spins as the spin-Peierls gap widens at temperatures below the spin-Peierls transition and use this behavior to estimate the size of the gap. At the very lowest temperatures the electronic spin fluctuations freeze out and the muon spin depolarization is dominated by a persistent static mechanism which we ascribe to a defect-spin system. We relate the low-temperature depolarization rate to the concentration of these defects, and we propose a model for the creation of spin defects by the muon itself.

Original language	English
Pages (from-to)	12241-12248
Number of pages	8
Journal	Physical Review B: Condensed Matter and Materials Physics
Volume	61
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.61.12241
Publication status	Published - May 2000

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10.1103/PhysRevB.61.12241

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title = "Spin fluctuations in the spin-Peierls compound MEM(TCNQ)2 studied using muon spin relaxation",

abstract = "We report a muon spin relaxation (mu SR) investigation of the organic spin-Peierls compound MEM(TCNQ)(2) at temperatures down to 39 mK. We have observed a slowing down of the electronic spins as the spin-Peierls gap widens at temperatures below the spin-Peierls transition and use this behavior to estimate the size of the gap. At the very lowest temperatures the electronic spin fluctuations freeze out and the muon spin depolarization is dominated by a persistent static mechanism which we ascribe to a defect-spin system. We relate the low-temperature depolarization rate to the concentration of these defects, and we propose a model for the creation of spin defects by the muon itself.",

author = "Lovett, {Brendon W} and Blundell, {S J} and Pratt, {F L} and T Jest{\"a}dt and W Hayes and S Tagaki and M Kurmoo",

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doi = "10.1103/PhysRevB.61.12241",

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T1 - Spin fluctuations in the spin-Peierls compound MEM(TCNQ)2 studied using muon spin relaxation

AU - Lovett, Brendon W

AU - Blundell, S J

AU - Pratt, F L

AU - Jestädt, T

AU - Hayes, W

AU - Tagaki, S

AU - Kurmoo, M

PY - 2000/5

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N2 - We report a muon spin relaxation (mu SR) investigation of the organic spin-Peierls compound MEM(TCNQ)(2) at temperatures down to 39 mK. We have observed a slowing down of the electronic spins as the spin-Peierls gap widens at temperatures below the spin-Peierls transition and use this behavior to estimate the size of the gap. At the very lowest temperatures the electronic spin fluctuations freeze out and the muon spin depolarization is dominated by a persistent static mechanism which we ascribe to a defect-spin system. We relate the low-temperature depolarization rate to the concentration of these defects, and we propose a model for the creation of spin defects by the muon itself.

AB - We report a muon spin relaxation (mu SR) investigation of the organic spin-Peierls compound MEM(TCNQ)(2) at temperatures down to 39 mK. We have observed a slowing down of the electronic spins as the spin-Peierls gap widens at temperatures below the spin-Peierls transition and use this behavior to estimate the size of the gap. At the very lowest temperatures the electronic spin fluctuations freeze out and the muon spin depolarization is dominated by a persistent static mechanism which we ascribe to a defect-spin system. We relate the low-temperature depolarization rate to the concentration of these defects, and we propose a model for the creation of spin defects by the muon itself.

U2 - 10.1103/PhysRevB.61.12241

DO - 10.1103/PhysRevB.61.12241

M3 - Article

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EP - 12248

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

IS - 18

ER -

Spin fluctuations in the spin-Peierls compound MEM(TCNQ)2 studied using muon spin relaxation

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Spin fluctuations in the spin-Peierls compound MEM(TCNQ)₂ studied using muon spin relaxation