Superparamagnetic nanoparticles and clusters of a few Fe atoms in amorphous Fe0.33Zr0.67alloys

Autor:	K Rhie, D G Naugle, B -H O, J T Markert, A H Morrish, X Z Zhou
Rok vydání:	1995
Předmět:	Magnetization Paramagnetism Mössbauer effect Magnetic moment Condensed matter physics Chemistry General Materials Science Condensed Matter Physics Saturation (magnetic) Magnetic susceptibility Superparamagnetism Amorphous solid
Zdroj:	Journal of Physics: Condensed Matter. 7:3315-3326
ISSN:	1361-648X 0953-8984
Popis:	A paramagnetic amorphous Fe0.33Zr0.67 alloy has been studied with Mossbauer spectroscopy and SQUID magnetometry. Low-field magnetization measurements revealed the existence of superparamagnetic nanoparticles of thousands of mu B embedded in the alloy with a blocking temperature of 50 K. A saturation of local moments (15.9 mu B), possibly clusters of a few Fe ions, is observed at 4.6 K around 10 kOe. The temperature dependence of the high-field magnetic susceptibility of Fe0.33Zr0.67 is interpreted with Curie's law for these Fe clusters and nanoparticles.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f178735c8474179fd1dc7be2c0785d4b https://doi.org/10.1088/0953-8984/7/17/014 Zobrazit plný text záznamu