Relaxation of muon spins in molecular nanomagnets

T. Lancaster; S. J. Blundell; F. L. Pratt; I. Franke; A. J. Steele; P. J. Baker; Z. Salman; C. Baines; I. Watanabe; S. Carretta; G. A. Timco; R. E P Winpenny

doi:10.1103/PhysRevB.81.140409

Relaxation of muon spins in molecular nanomagnets

T. Lancaster, S. J. Blundell, F. L. Pratt, I. Franke, A. J. Steele, P. J. Baker, Z. Salman, C. Baines, I. Watanabe, S. Carretta, G. A. Timco, R. E P Winpenny

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Abstract

We address the cause of the unusual muon spin-relaxation (μ+ SR) results on molecular nanomagnets (MNMs). Through measurements on protonated and deuterated samples of the MNMs Cr7 Mn (S=1) and Cr8 (S=0), we show that the muon spin for S≠0 MNMs is relaxed via dynamic fluctuations of the electronic spins. A freezing out of dynamic processes occurs on cooling and at low temperatures the muon spins are relaxed by the electronic spins which themselves are dephased by incoherent nuclear-field fluctuations. We observe a transition to a state of static magnetic order of the MNM electronic spins in Cr7Mn below 2 K. © 2010 The American Physical Society.

Original language	English
Article number	140409
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.81.140409
Publication status	Published - 28 Apr 2010

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title = "Relaxation of muon spins in molecular nanomagnets",

abstract = "We address the cause of the unusual muon spin-relaxation (μ+ SR) results on molecular nanomagnets (MNMs). Through measurements on protonated and deuterated samples of the MNMs Cr7 Mn (S=1) and Cr8 (S=0), we show that the muon spin for S≠0 MNMs is relaxed via dynamic fluctuations of the electronic spins. A freezing out of dynamic processes occurs on cooling and at low temperatures the muon spins are relaxed by the electronic spins which themselves are dephased by incoherent nuclear-field fluctuations. We observe a transition to a state of static magnetic order of the MNM electronic spins in Cr7Mn below 2 K. {\textcopyright} 2010 The American Physical Society.",

author = "T. Lancaster and Blundell, {S. J.} and Pratt, {F. L.} and I. Franke and Steele, {A. J.} and Baker, {P. J.} and Z. Salman and C. Baines and I. Watanabe and S. Carretta and Timco, {G. A.} and Winpenny, {R. E P}",

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T1 - Relaxation of muon spins in molecular nanomagnets

AU - Lancaster, T.

AU - Blundell, S. J.

AU - Pratt, F. L.

AU - Franke, I.

AU - Steele, A. J.

AU - Baker, P. J.

AU - Salman, Z.

AU - Baines, C.

AU - Watanabe, I.

AU - Carretta, S.

AU - Timco, G. A.

AU - Winpenny, R. E P

PY - 2010/4/28

Y1 - 2010/4/28

N2 - We address the cause of the unusual muon spin-relaxation (μ+ SR) results on molecular nanomagnets (MNMs). Through measurements on protonated and deuterated samples of the MNMs Cr7 Mn (S=1) and Cr8 (S=0), we show that the muon spin for S≠0 MNMs is relaxed via dynamic fluctuations of the electronic spins. A freezing out of dynamic processes occurs on cooling and at low temperatures the muon spins are relaxed by the electronic spins which themselves are dephased by incoherent nuclear-field fluctuations. We observe a transition to a state of static magnetic order of the MNM electronic spins in Cr7Mn below 2 K. © 2010 The American Physical Society.

AB - We address the cause of the unusual muon spin-relaxation (μ+ SR) results on molecular nanomagnets (MNMs). Through measurements on protonated and deuterated samples of the MNMs Cr7 Mn (S=1) and Cr8 (S=0), we show that the muon spin for S≠0 MNMs is relaxed via dynamic fluctuations of the electronic spins. A freezing out of dynamic processes occurs on cooling and at low temperatures the muon spins are relaxed by the electronic spins which themselves are dephased by incoherent nuclear-field fluctuations. We observe a transition to a state of static magnetic order of the MNM electronic spins in Cr7Mn below 2 K. © 2010 The American Physical Society.

U2 - 10.1103/PhysRevB.81.140409

DO - 10.1103/PhysRevB.81.140409

M3 - Article

SN - 1098-0121

VL - 81

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 14

M1 - 140409

ER -

Relaxation of muon spins in molecular nanomagnets

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