Role of grain size on the magnetic properties of La0.7Sr0.3MnO3

Autor:	K. P. Adhi, Bharat B. Kale, P.A. Yadav, N. Basavaih, Alka V. Deshmukh, Shankar I. Patil
Rok vydání:	2013
Předmět:	Materials science Condensed matter physics Annealing (metallurgy) Transition temperature Coercivity Condensed Matter Physics Grain size Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Magnetization Nuclear magnetic resonance Ferromagnetism Particle size Single domain
Zdroj:	Journal of Magnetism and Magnetic Materials. 328:86-90
ISSN:	0304-8853
Popis:	Nanophasic La0.7Sr0.3MnO3 samples were synthesized using the citrate-gel method. The samples were annealed at different temperatures ranging from 600 to 1200 °C. Grain size was observed to increase with the increase in annealing temperature. Furthermore, the magnetization data of these samples show well defined hysteresis. Saturation magnetization was observed to increase with increase in particle size. This gives evidence of formation of a magnetically dead layer at the surface. The thickness of the dead layer has also been calculated. The coercivity of nanoparticles follows the same trend as predicted theoretically and particles below 22 nm are found to be single domain. The ferromagnetic to paramagnetic transition temperature also increases with increase in particle size.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c48b971da3ad84480795468f78cb7cd9 https://doi.org/10.1016/j.jmmm.2012.09.056 Zobrazit plný text záznamu Full Text from ScienceDirect