Investigations of magnetic and dielectric properties of cupric oxide nanoparticles |
| |
| Authors: | Rohini S Bhalerao-Panajkar Mandar M Shirolkar Raja Das Pankaj Poddar |
| |
| Institution: | a DST Unit on Nanoscience, Department of Physics, University of Pune, Pune-411007, Indiab Department of Engineering and Applied Sciences, Vishwakarma Institute of Information Technology, Pune-411048, Indiac DST Unit on Nanoscience, Department of Physics, Indian Institute of Science Education and Research, Pune-411021, Indiad Physical and Materials Chemistry Division, National Chemical Laboratory, Pune-411008, India |
| |
| Abstract: | Cupric oxide nanoparticles of ∼8-10 nm width and 40-45 nm length self assembled as large particles ∼1-1.5 μm have been investigated, in the 10-325 K temperature range, using magnetic and dielectric measurements. In magnetic measurements a single broad peak at ∼230 K in a zero field cooled sample has been observed. Coercivity, in magnetization measurements at 10 K, suggests that the nanoparticles are core-shell type particles with an antiferromagnetic core and a ferromagnetic shell. Dielectric measurements, at various frequencies from 3.7 Hz to 949 kHz, exhibit a sharp peak at 284 K followed by weak anomalies around 213 and 230 K. |
| |
| Keywords: | A CuO nanoparticles A Ferromagnetic A Dielectric D Ferroelectric transition |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
