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Muon spin relaxation study of spin dynamics in a polysaccharide iron complex

Journal Article · · Journal of Applied Physics
DOI:https://doi.org/10.1063/1.1357866· OSTI ID:40204148
Polysaccharide iron complex, a ferritin analog, has been examined with zero-field muon spin-relaxation at temperatures from 2 to 40 K. Spectra exhibit a clear separation of static moments and collective excitations at low temperatures. At intermediate temperatures, superparamagnetic relaxation is observed and a blocking temperature of T{sub B}=10{+-}2.5K is measured, in agreement with transmission Mossbauer spectra and frequency dependent {chi}{sub ac} data. Superparamagnetic relaxation rates of 20{endash}150 MHz are in agreement with those extrapolated from Mossbauer spectra using a multilevel magnetic relaxation model. {copyright} 2001 American Institute of Physics.
Sponsoring Organization:
(US)
OSTI ID:
40204148
Journal Information:
Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 11 Vol. 89; ISSN 0021-8979
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English

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