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: an high temperature regime (300 – 100 K), an intermediate regime (100- 20 K) and a low temperature regime (below 20K). The characteristics of such regimes are discussed.
Magnetic Properties of Small Magnetite Nanocrystals / G., Muscas; G., Concas; C., Cannas; A., Musinu; A., Ardu; F., Orru; D., Fiorani; S., Laureti; Rinaldi, Daniele; G., Piccaluga; D., Peddis. - In: JOURNAL OF PHYSICAL CHEMISTRY. C. - ISSN 1932-7447. - STAMPA. - 117:44(2013), pp. 23378-23384. [10.1021/jp407863s]
Magnetic Properties of Small Magnetite Nanocrystals
RINALDI, DANIELE;
2013-01-01
Abstract
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: an high temperature regime (300 – 100 K), an intermediate regime (100- 20 K) and a low temperature regime (below 20K). The characteristics of such regimes are discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
