Anomalies in the Relaxation of Small Magnetic Particles at Very Low Temperatures

R. Sappey , E. Vincent , J. Hammann , F. Chaput , J.P. Boilot , D. Zins

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classification ❄️ cond-mat

keywords relaxationparticlessmallanomaliesaroundbeendiscusseddispersed

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The magnetization relaxation rate of small gamma-Fe2O3 particles dispersed in a silica matrix has been measured from 60 mK to 5 K. It shows a minimum around 150 mK, that can be discussed in terms of either thermal or quantum relaxation regime.

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Anomalies in the Relaxation of Small Magnetic Particles at Very Low Temperatures

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