Synthesis and characterization of Co and Mn doped NiO nanoparticles

Autor:	S. Sathishkumar, Kuppusamy Thavamani, K. Vallalperuman, M. Parthibavarman, Manickam Durairaj
Rok vydání:	2014
Předmět:	Nuclear magnetic resonance Materials science Spintronics General Chemical Engineering Non-blocking I/O Analytical chemistry Nanoparticle Curie temperature Charge carrier General Chemistry Magnetic semiconductor Conductivity Nanocrystalline material
Zdroj:	Korean Journal of Chemical Engineering. 31:639-643
ISSN:	1975-7220 0256-1115
Popis:	Diluted magnetic semiconductors (DMS) are intensively studied for their potential spintronics applications, especially those with Curie temperature above the room temperature. Ni1−x Mn x O and Ni1−x Co x O (x=1% & 2%), nanoparticles with size around 40–50 nm, were prepared by co-precipitation method. An NiO single phase structure was confirmed by powder X-ray diffraction measurements. Also, diffraction peaks show a systematic shift towards higher angle with an increase in Mn concentration, which is associated with the lattice variation. The samples were pelleted and examined for its magnetic property using a vibrating sample magnetometer (VSM); it indicates paramagnetic-like behavior at room temperature. The increase in a.c conductivity with increasing temperature is attributed to the increase in drift mobility of the charge carriers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6f129646e876e1cbd778adbaa1c719e7 https://doi.org/10.1007/s11814-013-0286-2 Zobrazit plný text záznamu Full text from SpringerLink