Grain Size Induced Metal-insulator Transition in La0.7Sr0.3MnO3 Compounds

Автори Hilal Ahmad Reshi, Vilas Shelke
Приналежність

Novel Materials Research Laboratory, Department of Physics, Barkatullah University, Bhopal (M.P.) India

Е-mail drshelke@gmail.com
Випуск Том 5, Рік 2013, Номер 4
Дати Одержано 23.08.2013, опубліковано online - 31.01.2014
Посилання Hilal Ahmad Reshi, Vilas Shelke, J. Nano- Electron. Phys. 5 No 4, 04053 (2013)
DOI
PACS Number(s) 72.80.Sk
Ключові слова Nanomaterials (4) , Manganites (2) , Metal-insulator transition (3) .
Анотація The effect of different synthesis techniques on structural, microstructural and electrical properties of La0.7Sr0.3MnO3 (LSMO) was investigated. Two different techniques viz solid state reaction (SSR) and sol-gel (SG) method were used to prepare the samples. X-ray studies have confirmed the single phase formation of LSMO by both the techniques. The average grain size was 2 m for solid state reaction sample and 22 nm for sol-gel sample. A substantial enhancement in electrical resistivity was observed in the sample with nanosized grains. The micro grain size sample exhibited metallic behaviour whereas nanoparticle sample showed metal-insulator transition around 250 K.

Перелік посилань