4.6 Article

Magnetic Properties of Small Magnetite Nanocrystals

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JOURNAL OF PHYSICAL CHEMISTRY C
卷 117, 期 44, 页码 23378-23384

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AMER CHEMICAL SOC
DOI: 10.1021/jp407863s

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This paper focuses on the study of the magnetic properties of 9 nm magnetite nanocrystals. XRD and TEM measurements indicate the presence of crystalline particles, with a fraction of them only partially crystallized or highly defective. The analysis of the temperature dependence of the zero-field-cooled/field-cooled magnetization and of the thermoremanent magnetization provides evidence of the existence of three magnetic regimes: a high temperature regime (300-100 K), an intermediate regime (100-20 K), and a low temperature regime (below 20 K). The characteristics of such regimes are discussed.

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