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Spin freezing and dynamics in Ca3Co2-xMnxO6 (x approximate to 0.95) investigated with implanted muons: Disorder in the anisotropic next-nearest-neighbor Ising model

Abstract:
We present a muon-spin relaxation investigation of the Ising chain magnet Ca3 Co2-x Mnx O6 (0.95). We find dynamic spin fluctuations persisting down to the lowest measured temperature of 1.6 K. The previously observed transition at around 18K is interpreted as a subtle change in dynamics for a minority of the spins coupling to the muon that we interpret as spins locking into clusters. The dynamics of this spin fraction freeze below a temperature TSF.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.80.020409

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics, REF-Physics
Role:
Author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Role:
Author
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Journal:
PHYSICAL REVIEW B
Volume:
80
Issue:
2
Publication date:
2009-07-05
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:c4d19705-0e98-4b06-bd2a-38586c486a85
Source identifiers:
13651
Local pid:
pubs:13651

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