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

1996/09/03 by R. Sappey, Sappey, R., E. Vincent +9
Energy · Engineering · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Condensed Matter (cond-mat) #FOS: Physical sciences #Iron oxide chemistry and applications #Magneto-Optical Properties and Applications #cond-mat

paper · pdf · doi:10.48550/arxiv.cond-mat/9609025

8 pages, 4 figures

arxiv created 1996/09/03 · openalex publication_date 1996/09/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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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