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Preparation and magnetocaloric effect of (La0.67-XGdX)Sr0.33MnO3 (X?=0.1,0.15) nanoparticles.
- Source :
-
Applied Physics A: Materials Science & Processing . May2005, Vol. 80 Issue 8, p1683-1687. 5p. - Publication Year :
- 2005
-
Abstract
- We report a new route to synthesize nanosized (La0.67-XGdX)Sr0.33MnO3 (X=0.1,0.15) perovskite crystalline complex oxides at calcination temperatures of 600-900 °C using amorphous molecular alloy as precursor. The precursor could completely decompose into oxide at temperatures below 500 °C according to thermogravimetric analysis and differential thermal analysis results. X-ray diffraction demonstrated that the decomposed species was composed of perovskite structure at a calcination temperature of 600 °C for 2 h. The size and topography of the oxides are dependent on the calcination temperature of the precursor. The resulting particle size is in the range of 40-120 nm as determined by a transmission electron microscope. This method is effective and can be easily quantitatively controlled to synthesize nanosized perovskite complex oxides. The Curie temperature TC and the magnetocaloric effect of (La0.67-XGdX)Sr0.33MnO3 (X=0.1,0.15) nanoparticles are discussed based on the measurement of the low-field magnetization curve and the isothermal magnetization curve. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NANOPARTICLES
*OXIDES
*MAGNETIZATION
*PEROVSKITE
*PARTICLES (Nuclear physics)
Subjects
Details
- Language :
- English
- ISSN :
- 09478396
- Volume :
- 80
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Applied Physics A: Materials Science & Processing
- Publication Type :
- Academic Journal
- Accession number :
- 16600401
- Full Text :
- https://doi.org/10.1007/s00339-004-3145-5